HomeMy WebLinkAboutSW PROSPECT AND I 25 ROADWAY PROJECT - RP180001 - SUBMITTAL DOCUMENTS - ROUND 3 - (3)Erosion Control Review : Comments & Redlines
Project Information
Project Name: ______________________________ Project Number: ____________________
Prior Name(s): ______________________________ Prior Number(s): ______________________
Round _____ Date Submitted: _____________ Comment Due Date: _____________
Total Disturbance __________ SF
GPS Lat _______________ GPS Long _______________
Sensitive Area _____ Steep Slopes (3H:1V) _____
This review or prior reviews showed this to be well under the threshold for needing erosion control. _____
Project Review Check Sheets & Comments
Comments:
__________
Staff
Dev Review Coordinator ______________
Zoning ______________
Planner ______________
Engineer______________
Water Utilities Reviewer ______________
Developing Party
Owner ______________
Owner’s Company ____________
Developer ______________
Developer’s Company ____________
EC Design Engineer ______________
EC Design Firm ______________
Review Information
Reviewer: _____________________
Received: _____________
Completed Review: __________
Cursory Review Time (hr.): __________
Full Review (hr.): __________
Phone Correspondence (hr.): __________
Email Correspondence (hr.): __________
Internal Staff Coordination (hr.): __________
Applicant Meeting (hr.): __________
Enter all hours round to the nearest 0.25 (15 min)
Northern Engineering responses by:
Benjamin Ruch
Project Engineer
1
Basil Hamdan
From: Development Review Coordinators
Sent: Friday, December 28, 2018 3:53 PM
To: Development Review Group
Subject: Development Review Weekly Project Summary 12.28.2018
Attachments: 622 W Laurel Duplex ; Block 23 - COMMENTS DUE ; SW Prospect & I-25 - COMMENTS DUE
Development Review Weekly Project Summary
Projects Submitted This Week (12/20‐12/26)
Project Name Project
Number
Previous Project
Number(s) Project Team Status
Comments
Due Date
1 SW Prospect &
I‐25
RP180001 NA Brandy, Marc Routed 01/15/2019
2 Block 23 BDR180032 CDR180051 Brandy, Clark,
Spencer Routed 01/15/2019
3 622 W Laurel St
‐ Duplex
BDR180040 CDR170059 Tenae, Clay,
Morgan Routed 01/15/2019
*Scroll down for more information on the projects that have been routed this week
Routed Minor Amendments and County Referrals
Upcoming Projects To Be Submitted
*Routed Project Information:
1. SW Prospect & I‐25 – RP180001
Round: 2
Project Name Project Number Project Team Routed
Date
Comments
Due Date
Summitstone MA180094 Jamie Kimberlin 12/24/2018 01/07/2019
Project Name/Type Project Team Tentative Submittal Date
Cherry Street Cottages / FDP Tenae, Jason, Katie 01/02/2019
Hellenic Plaza Tenae, Jason, Marc 01/02/2019
FTC Westbury Brandy, Clark, Spencer 01/02/2019
2
Project Team
Coordinator: Brandy
Planner: NA
Engineer: Marc
Project Location: Located at SW Prospect & I‐25
Project Description: The project is proposing an interim roadway section with an asphalt width of 28 feet, which
allows for two 12¿ travel lanes with a 2¿ asphalt shoulder on either side. This interim cross‐section is proposed
to match the existing cross‐section currently located on the site. A drainage swale is designed on the high
gradient side that will travel along the roadway and collects at a natural low point in the property, where it is
diverted under the roadway to the low gradient side. The low gradient side will tie into existing grade at a 4:1
slope. The project will also include public infrastructure require for future development within the relocation of
the SW Frontage Road, which include public water and wastewater.
PDT USE ONLY: S:\CDNS\Planning\Project Submittal Documents\SW Prospect & I‐25\0_Submittal\Round_2
2. Block 23 – BDR180032
Round: 2
Project Team
Coordinator: Brandy
Planner: Clark
Engineer: Spencer
Project Location: Located at Located at southwest corner of N College Ave and Cherry St
parcels #9711124023, 9711124021, 9711124025, 9711124007, and 9711124001
300 North Mason; 303, 331, and 343 N College
Project Description: This is a request for a Basic Development Review for a replat of the remaining parcels on
Block 23 at the southwest corner of N College Ave and Cherry St (parcels #9711124023, 9711124021,
9711124025, 9711124007, and 9711124001). The property is located within the Downtown (D) Zoning district.
PDT USE ONLY: S:\CDNS\Planning\Project Submittal Documents\Block 23 Replat\0_Submittal\Round_2
3. 622 W Laurel Duplex – BDR180040
Round: 1
Project Team
Coordinator: Tenae
Planner: Clay
Engineer: Morgan
Project Location: Located at 622 W Laurel St
Project Description: This is a request for a Basic Development Review to convert the existing single‐family
residence at 622 W Laurel into a legal duplex. There will be no exterior changes with this project.
PDT USE ONLY: S:\CDNS\Planning\Project Submittal Documents\622 W Laurel St. ‐
Duplex\0_Submittal\Round_1\Submittal_Documents
3
Document Download. Paper copies will not be distributed. Digital copies are available for download at the links under
the individual project.
FOR OUTSIDE AGENCIES:
Go to http://citydocs.fcgov.com/ Enter project number in the search bar to find submittal materials.
Please allow 1‐2 business days for the records to be updated.
The Staff Review Meetings are scheduled for January 16, 2019 (unless otherwise noted). The Staff Review
Agenda will indicate the time of the meeting.
Please provide any comments you may have in Accela by the due date. Please save any redlines to the “Redlines”
folder in the Project Submittal Documents file or email directly to the Development Review Coordinator.
If you do not have access to the Accela program, please send your comments via email to the Development Review
Coordinator for the project. Should you need assistance with entering comments in Accela or have any other questions,
please contact the Development Review Coordinator prior to the meeting.
If additional submittal documents were requested and are not provided or if there are other issues with the electronic
document routing, please notify the Development Review Coordinator as soon as possible.
Thanks,
Development Review Coordination
Tenae Beane / Brandy Bethurem Harras / Todd Sullivan
City of Fort Collins Community Development & Neighborhood Services
281 N. College Ave.
Fort Collins, CO 80524
970.221.6689
DRCoord@fcgov.com
SW Prospect / I-25 Road Project
Project Narrative
Project Location:
The project is located within the East Half of Section 21, Township 7 North, Range 68 West of the 6th
P.M. More specifically the project is located on the southwest corner of the intersection of Interstate 25
and E. Prospect Road. The project is located within a 142-acre property currently owned by Colorado
State University Research Foundation (CSURF). The project will consist of relocating a portion of the
Southwest Frontage Road currently owned and maintained by the Colorado Department of
Transportation (CDOT).
Project Process:
The relocation of the frontage road is proposed as a Road Project (RP) and is accompanied with a Right-
of-Way Dedication Application for the Right-of-Way required to encompass the new roadway alignment.
While the Right-of-Way dedication will include the width of a proposed ultimate section, the fees have
been calculated to include the Right-of-Way required for the interim section plus 4’ shoulders on both
sides for a total width of 36 feet with the understanding that additional fees would be assessed at the
time the ultimate roadway section is designed.
Project Description:
The project is proposing an interim roadway section with an asphalt width of 28 feet, which allows for
two 12’ travel lanes with a 2’ asphalt shoulder on either side. This interim cross-section is proposed to
match the cross-section of the existing frontage road. A drainage swale is designed on the high gradient
side that will travel along the roadway and collects at two natural low points on the property, where it is
diverted under the roadway to the low gradient side using culverts. The low gradient side will tie into
existing grade at a 4:1 slope. The project will also include public infrastructure require for future
development within the relocation of the SW Frontage Road, which include public water and
wastewater.
This Road Project (RP) is proposed to be followed by a Planned Unit Development (PUD) process and a
Project Development Plan (PDP) for a portion of the overall PUD area, referred to Phase I hereon. The
reason for processing the Road Project prior to the PUD and PDP is to have the realignment of the
frontage road constructed prior to the improvements proposed by CDOT to the intersection of E.
Prospect Road and Interstate 25. The proposed improvements by CDOT would require a portion of the
SW Frontage Road to be relocated to allow for additional width within the CDOT Interstate 25 Corridor
and is anticipated to start in early June 2018. The alignment that CDOT is currently proposing does not
meet Larimer County Urban Area Street Standards (LCUASS) minimum radii for any street classification.
This would require the realigned frontage road to be removed and replaced per LCUASS minimum
standards at the time of the PDP for Phase I. To minimize material and efforts, this project is required to
be completely constructed and operational in advance of any planning, mobilization, or construction of
the proposed CDOT realignment. It is envisioned that initial grubbing and street preparation would
occur in late February and extend into March. Due to the amount of fill material, this stage of the
project is projected to take the most amount of time. Paving of the bottom lift would quickly follow,
with the expectation of completion in April and acceptance in early May. Through the duration of
construction, it is proposed that an interim connection will remain at all times to allow emergency
access to the weight station. At the locations of each connection, the existing roadway base material
will be used as a temporary all-weather surface for access. After final connections are established, the
interim access will be blocked by Type III Barricades. The existing frontage road will remain for until
approval of Phase I to allow for the recycling of material to be used for the roadway section proposed
within Phase I of the overall project. It is proposed that the interim section would remain until Phase I is
approved and constructed, at which point, the approved ultimate section would be constructed.
Without knowing the exact ultimate section that would be designed and approved, the proposed
interim section results in the least amount of reconstruction and redesign. Along with the interim cross-
section, an interim pavement section is proposed and would exclude the top lift of asphalt. This would
allow for wearing to occur prior to the construction of the ultimate section, at which point, the entire
street section would be constructed with the top lift allowing for the entire roadway to look and feel like
a new street.
Submittal Documents:
The documents that will be submitted with the Road Project include the following items
• Project Narrative
• Roadway Plans
• Transportation Development Review Fee Form
• Deed of Dedication
• Drainage Narrative
• Erosion Control Report
The project is located within the Boxelder Sanitation District and the ELCO Water District. Plans
required for water and sewer improvements will be sent directly to Boxelder and ELCO for their review
and approval. We would look to the City to route and coordinate with CDOT for review of this project.
With the project only including the relocation of the frontage road, many items required for a Project
Development Plan (PDP) are not included for reasons described hereon. A Geotechnical Report has not
been provided with Road Project, but a complete pavement design will be required at the time of
construction. A Traffic Impact Study has not been provided with the understanding that traffic counts
would stay consistent with existing conditions after the completion of the project. The functionality of
the roadway would also be improved by the new alignment and larger sweeping curves. With the
project being followed closely by a PUD and PDP application, we have not provided and Ecological Study.
Through previous meetings with City Staff, it was discussed that there is currently a high-quality wetland
located in the middle of the overall site. It is the overall project’s objective for the entire property to
make all enhancements and wetland mitigations in that location to enhance the existing wetland and
make it a feature for the entire project to enjoy and use.
Drainage Narrative:
With the close proximity to the Boxelder Drainageway, the additional imperviousness will not adversely
affect the existing site, the existing drainageway or any downstream facilities. It is the understanding
that the free release of stormwater this close to an established drainageway and this far down the
receiving basin will beat the peak of all storm events, and only improve the structural integrity of the
drainageway by not contributing to the flows during high flows and damaging velocities. All pollutants
generated from the proposed frontage road will be treated through the use of vegetated swales
(drainage from the northern portion of the frontage road) or through vegetated buffers (drainage from
the southern portion of the frontage road). Please see the drainage report prepared by Northern
Engineering for further detail.
Maintenance & Repairs:
The standard Maintenance and Repair Agreements are proposed to start at the time the interim
roadway section is completed. These agreements would restart at the time the final lift of the ultimate
section is constructed for Phase 1 of the PDP to follow the project. It is proposed that after the two year
Maintenance Agreement period of the interim frontage road section has expired, the City of Fort Collins
would take the maintenance of the proposed frontage road, which would include snow clearing at the
priority level of a local roadway and repairs required for normal wear and tear, but any structural failure
above that will be the responsibility of the property owner.
Community Development and
Neighborhood Services
281 North College Avenue
PO Box 580
Fort Collins, CO 80522
970.221.6689
970.224.6134 - fax
fcgov.com/developmentreview
November 09, 2018
Bo Brown
CSURF
PO Box0483
Fort Collins, CO 80522
RE: SW Prospect & I-25, RP180001, Round Number 1
Please see the following summary of comments from City staff and outside reviewing agencies for your submittal
of the above referenced project. If you have questions about any comments, you may contact the individual
commenter or direct your questions through your Development Review Coordinator, Brandy Bethurem Harras, at
970.416.2744 or bbethuremharras@fcgov.com.
Comment Summary:
Department: Engineering Development Review
Contact: Marc Virata, 970-221-6567, mvirata@fcgov.com
Topic: General
Comment Number: 1
11/06/2018: FOR APPROVAL:
It is my understanding that PFA is interested in ensuring that during the course of construction, they would have
access to the old section of roadway as a means to have access to the CDOT weigh station. We'll want to
coordinate with PFA on their access needs during the course of construction.
RESPONSE: The project sequencing will ensure that emergency access will be achieved during all phases of the
project. This may require an all-weather surface at the intersections, but this can be achieved with the existing
base material of the existing frontage road. It is anticipated that continued discussions and game planning will
occur throughout the construction process to ensure that both construction activities and emergency services are
maintained. Further mapping and sequencing can be established at time of the DCP.
Comment Number: 2
11/06/2018: FOR APPROVAL:
The temporary frontage road connection to the existing frontage road at the southern boundary of the proposal has
a roadway design more consistent with a local street with 165' radii and 100 foot tangents between curves. Is the
intent of the design to be permanent and the viewpoint is that local street design characteristics can be used here? I
would believe this is acceptable under the premise that the buildout of the PUD would demonstrate traffic would not
be envisioned to ever go south to this section of roadway.
RESPONSE: CDOT has indicated that further takings would occur at some point in the future. The current
alignment at the terminus of the Collector Section would align with these future takings. Whether this ever
happens, the traffic counts at this location will only require a local street, which the current alignment adheres to all
the local street requirements.
Comment Number: 3
11/06/2018: FOR APPROVAL:
With only the right-of-way being dedicated at this time, would there be an issue of the utility crossings being
installed at this time with portions of utility being outside of a prescribed easement or right-of-way?
RESPONSE: The utilities are extended outside of the current right-of-way, but will be within the required Utility
Easement that will be included in the Phase I Replat.
Comment Number: 4
11/06/2018: FOR APPROVAL:
From the depiction on Sheet C2.01, there appears to be an issue of a storm crossing (culvert #2) of the roadway
that is shallow with a little more than 2 feet from the top of pipe to the finished grade. Also, with the assumption that
finished grade is indicative of top lift, there would be an interim condition of even less than the ideal cover.
Subsequent sheets however appear to show more adequate cover.
RESPONSE: The storm culvert will have a minimum of three feet of cover at the flowline in the roadway’s ultimate
condition. Profile has been fixed to show correctly.
Comment Number: 5
11/9/2018 UPDATE:
To further expand on this comment, Chad Crager has confirmed that not constructing the top lift of asphalt is
acceptable to the City. Maintenance as described in the project narrative is acceptable.
RESPONSE: Acknowledged.
11/06/2018: FOR APPROVAL:
The original comment below was prior to further discussions with Chad Crager. Chad is coordinating further on this
and I'll be providing further updates on this.
ORIGINAL COMMENT
In checking with Tom Knostman with City Streets Pavement Manager, the indication in the project narrative that the
interim road without final lift would be maintained by the City should have further discussion/verification. Tom can
see a scenario that without top lift, the City could at the conclusion of the warranty period, be responsible for crack
sealing and pothole spray patching of the bottom lift, but any failures to the roadway itself beyond normal wear and
tear he would envision the applicant would still be responsible in this interim condition. Understanding the duration
in which the interim section would be in place before the permanent section would be helpful as well.
Tom notes that snow clearing at a priority level of a local roadway would not necessarily be a concern as a local
roadway, it should be noted that this would a priority 4 classification (the lowest) and would have the least level of
maintenance in that regard.
Comment Number: 6
11/9/2018 UPDATE:
I've had conversations with the City Attorney's Office, and their initial reaction is that the deed of dedication for
right-of-way is awkward to be the mechanism to place stipulations such as the maintenance/repair guarantee and
other language that would traditionally be in a development agreement. At this point, the City Attorney's Office
believes a development agreement would be the best mechanism instead of covering concerns under the deed of
dedication. I will look to provide further confirmation on this item with further input from CAO.
RESPONSE: A Development Agreement seems appropriate for this project.
11/06/2018: FOR APPROVAL:
I will need to have further discussion on the maintenance and repair guarantee aspects for the interim roadway. I'll
look to follow-up with our City Attorney to verify if there is a manner in which the deed of dedication can have the
maintenance and repair language be part of the dedication, which would be the most unusual, but I think the
simplest way to address this, for not having a plat or a development agreement (presumably) which would normally
be the mechanism to have this. Also, I would need to follow-up further on whether the dedication can/should have
the details behind the pavement condition/City maintenance responsibilities, etc.
Comment Number: 7
11/06/2018: FOR APPROVAL:
In addition to the item above, one of the aspects I'm still a little hazy on is the intent behind the maintenance for the
existing portions of frontage road that is not being rebuilt and this road project is tying into on both ends. Are these
not being proposed to be City maintained, but this middle portion would be? Or, is it also being proposed that these
sections be City maintained but then they are not in City right-of-way currently?
RESPONSE: The existing portion of the Frontage Road would remain as currently maintained by CDOT until the
devolution from CDOT to the City occurs, at which time, the maintenance of the remaining portion of frontage
roadway would be the responsibility of the City.
Comment Number: 8
11/06/2018: FOR APPROVAL:
It is presumed that DCP for the construction of the project will be needed.
RESPONSE: We would agree.
Comment Number: 9
11/9/2018 UPDATE:
This comment is considered resolved as Light and Power has confirmed that they will not provide lighting on the
roadway at this time and this is not being sought by the applicant as well.
RESPONSE: Correct.
11/06/2018: FOR APPROVAL:
Will there be roadway lighting for City streets that is being anticipated with the interim road section?
Comment Number: 10
11/09/2018: FOR APPROVAL:
Please provide within the project narrative a project schedule that gives estimated dates and timeframes that lists
the proposed construction of the road, CDOT's work, the construction of the permanent widened road, removal of
the old road, etc.
RESPONSE: An approximate project schedule has been included within the project narrative.
Department: Stormwater Engineering
Contact: Heather McDowell, 970-224-6065, hmcdowell@fcgov.com
Topic: General
Comment Number: 6
11/01/2018: FOR APPROVAL:
This project proposal includes the construction of a new frontage road at the southwest quadrant of the Prospect
and I-25 interchange. This proposal will realign the existing frontage road thereby creating a new roadway through
the property and abandon and remove sections of the existing frontage road. As such, this project does not meet
the definition of an “Excluded Site” per Part I, Section E.4.a.i of the MS4 permit. Therefore, this project proposal will
need to include a drainage analysis that quantifies the overall existing imperviousness and proposed
imperviousness. If the overall imperviousness does not increase by more than 1000 sf, then quantity detention for
the roadway project will not be required. If there is an increase of imperviousness by more than 1000 sf, then
complete drainage calculations and quantity detention will need to be provided. Regardless of any added
imperviousness, the proposed drainage swales and culverts will need to be sized using an approved drainage
analysis methodology. In addition, because of the MS4 permit requirements, standard water quality will need to be
provided for the new roadway. The City will allow that the LID provisions of the stormwater requirements be
provided with future lot development.
RESPONSE: Drainage report and Impervious exhibit area provided.
Contact: Jesse Schlam, 970-218-2932, jschlam@fcgov.com
Topic: Erosion Control
Comment Number: 1
10/24/2018: INFORMATION ONLY:
The site disturbs more than 10,000 sq. ft. and therefore Erosion and Sediment Control Materials need to be
submitted. The erosion control requirements can be located in the Stormwater Design Criteria under the
Amendments of Volume 3 Chapter 7 Section 1.3.3. a copy of the erosion control requirements can be found at
www.fcgov.com/eroison .
RESPONSE: An erosion control report and escrow have been included within this submittal.
Comment Number: 2
10/24/2018: INFORMATION ONLY:
Based upon the area of disturbance, State permits for stormwater will be required since the site is over an acre and
should be pulled before Construction Activities begin.
RESPONSE: Acknowledge.
Comment Number: 3
10/24/2018: FOR APPROVAL:
Please resubmit Erosion Control Plans based upon redlines to meet City Criteria.
RESPONSE: Plans have been submitted.
Comment Number: 4
10/24/2018: FOR APPROVAL:
Please submit an Erosion Control Report to meet City Criteria.
RESPONSE: Erosion Control Report has been submitted.
Comment Number: 5
10/24/2018: DEVELOPMENT AGREEMENT:
Please submit an Erosion Control Escrow / Security Calculation to ensure the Erosion Control Plans to meet City
Criteria.
RESPONSE: An Erosion Control Escrow has been submitted.
Department: Environmental Planning
Contact: Stephanie Blochowiak, 970-416-4290, sblochowiak@fcgov.com
Topic: General
Comment Number: 1
11/06/2018: INFORMATION ONLY:
Generally an Ecological Characterization Study (ECS) is required by City of Fort Collins Land Use Code (LUC)
Section 3.4.1 as the site is within 500 feet of LUC defined natural habitats and features (wetlands, ditches, active
raptor nests). However, if the project does not significantly change drainage patterns to the wetlands to the south,
then the ECS can be deferred at this time for this small cornfield area. And ECS is needed if and when a
development proposal is submitted for the parcels further south. The ECS is due a minimum of 10 days prior to
PDP submittal.
RESPONSE: The wetlands will not be effected within this phase of the overall project.
Comment Number: 2
11/06/2018: FOR APPROVAL:
Please clarify what impact if any would occur to any and all existing ditches, swales, wetlands and trees due to the
scope of the proposed road project.
Comment Number: 3
11/06/2018: INFORMATION ONLY:
Note there are several active nests including active raptor nests in this general area especially to the west and
south of this corner parcel.
RESPONSE: Acknowledged.
Comment Number: 4
11/07/2018: FOR APPROVAL:
Will there be lighting? Note in regard to outdoor lighting, especially LED light fixtures, cooler color temperatures are
harsher at night and cause more disruption to circadian (biological) rhythms for both humans and wildlife. Warmer
color temperature (warm white, 3000K or less) for any LED light fixtures is preferred. Please also consider fixtures
with motion-sensing or dimming capabilities so that light levels can be adjusted as needed. Site light sources shall
be fully shielded and down-directional to minimize up-light, light spillage and glare [see LUC 3.2.4(D)(3)]. Thank you
in advance for supporting City of Fort Collins Night Sky Objectives. For further information regarding health effects
please see: http://darksky.org/ama-report-affirms-human-health-impacts-from-leds/
RESPONSE: Lighting will not be included within this phase.
Comment Number: 5
11/07/2018: FOR APPROVAL:
Ensure natural resource protection measures are in place including for any wetlands and/or trees. These resources
should be protected during demolition of existing roads and construction of the temporary roadway. No tree removal
is to occur. Right of Way dedication may need to memorialize agreements for natural resources and stormwater.
RESPONSE: There are no existing trees within the area being demolished or the area of construction.
Comment Number: 6
11/07/2018: FOR DCP:
Environmental Planning will ensure limits of the road project impacts are clear and that natural resources are
protected during construction of this temporary road project. Environmental Planning and Forestry will attend the
DCP meeting.
RESPONSE: Acknowledged.
Department: Forestry
Contact: Molly Roche, 224-616-1992, mroche@fcgov.com
Topic: General
Comment Number: 1
11/06/2018: FOR APPROVAL:
There are existing trees within the project area. These trees should be protected throughout the construction period
of this project. Please include the City of Fort Collins Tree Protection Notes to the site/utility plans. Provide a note
that states: EXISTING TREES TO REMAIN AND BE PROTECTED.
RESPONSE: Standard note added to Existing Conditions & Demolition Plan sheets.
In addition, prior to DCP provide narrative regarding existing tree retention and protection.
If trees are to be retained, please include the City of Fort Collins Tree Protection Notes to the site/utility plans.
Provide a note that states: EXISTING TREES TO REMAIN AND BE PROTECTED.
If trees are planned to be removed in conjunction with this road project, please schedule an on-site meeting with
City Forestry to obtain existing tree inventory and mitigation information. This meeting should occur prior to next
submittal. Existing, significant trees should be retained and protected to the extent reasonably feasible. Please
note: any tree removal that occurs must be done by a City of Fort Collins Licensed Arborist.
RESPONSE: There are no existing trees within the area being demolished or the area of construction.
Department: PFA
Contact: Andrew Rosen, 970-416-2599, arosen@poudre-fire.org
Topic: General
Comment Number: 1
10/29/2018: ACCESS
>Access shall be maintained to the southbound weigh station and any other businesses at all times.
>The Temporary Roadway before top-lift shall be constructed to support 40T
RESPONSE: Access will be maintained at all times of the project either by the existing frontage road or the
proposed frontage road.
Department: Technical Services
Contact: Jeff County, 970-221-6588, jcounty@fcgov.com
Topic: Construction Drawings
Comment Number: 1
11/06/2018: FOR APPROVAL:
The City has moved to the NAVD88 vertical datum, and as of January 1, 2015, all projects are required to be on
NAVD88 datum. Please provide the following information for the Benchmark Statement in the EXACT format shown
below.
PROJECT DATUM: NAVD88
BENCHMARK # w/ DESCRIPTION
ELEVATION:
BENCHMARK # w/ DESCRIPTION
ELEVATION:
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM. SURROUNDING
DEVELOPMENTS HAVE USED NGVD29 UNADJUSTED (PRIOR CITY OF FORT COLLINS DATUM) FOR THEIR
VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS REQUIRED FOR ANY
PURPOSE, THE FOLLOWING EQUATION SHOULD BE USED: NGVD29 UNADJUSTED (PRIOR CITY OF
FORT COLLINS DATUM) = NAVD88 - X.XX’.
RESPONSE: Note updated.
Comment Number: 2
11/06/2018: FOR APPROVAL:
There are matchline issues. See redlines.
RESPONSE: Matchlines updated.
Topic: General
Comment Number: 3
11/08/2018: FOR APPROVAL:
There are references to separate documents to be filed that have empty blanks. Please make sure these are filled
in prior to submitting mylars.
RESPONSE: Acknowledged.
Comment Number: 4
11/08/2018: FOR APPROVAL:
The Right Of Way dedication has some corrections to be made. This will be coordinated through Marc Virata.
RESPONSE: Acknowledged.
December 24, 2018
DRAINAGE LETTER
SW Prospect & I-25
Fort Collins, Colorado
Prepared for:
Colorado State University Research Foundation (CSURF)
Michael “Bo” Brown
P.O. Box 483
Fort Collins, Colorado 80522
Prepared by:
301 North Mason Street, Suite 100
Fort Collins, Colorado 80524
Phone: 970.221.4158
www.northernengineering.com
Project Number: 232-043
Drainage Letter – SW Prospect & I-25
Date: December 24, 2018
Project: SW Prospect & I-25 Project No. 232-043
Public Improvement Construction Plans (PICP)
Fort Collins, Colorado
Attn: City of Fort Collins Stormwater Utility
700 Wood Street
Fort Collins, Colorado 80521
To whom it may concern:
This letter serves to address the stormwater impacts of the proposed project known as “SW Prospect & I-25”.
The site is located in northeast Fort Collins and is bounded to the north by East Prospect Road, to the east by
the existing Interstate 25 access ramp and frontage road, to the south by a gravel road and to the west by
Boxelder Creek (Figure 1). The proposed development consists of the removal of a portion of the existing
Interstate 25 Frontage Road, and the construction of a new asphalt Frontage Road with a revised alignment.
This project will also involve the construction of two culverts under the new road that will be utilized in the later
development of the site.
This letter is intended to show that the proposed construction of the new road will reduce the amount of
imperviousness of the site, and that the swales and culverts constructed will be sufficient in the interim at
maintaining existing drainage patterns, and for use at the time of full build out on the north side of the road as
part of a larger storm drain system.
Site Imperviousness
Construction of the new Interstate 25 Frontage Road will begin with the removal of the existing road.
Approximately 2,750 liner feet of 30-foot wide asphalt road will be removed accounting for 82,441 square
feet. The new road will then be constructed along an updated alignment, consisting of approximately 2,295
linear feet of 28-foot wide asphalt pavement. The new roadway will have a total impervious area of 66,053
square feet; a reduction in impervious area of 16,388 square feet. The resulting reduction in impervious area
negates the need for quantity detention for the roadway project. Please see the Impervious exhibit provided in
the attachments.
Drainage Patterns
With the construction of the Frontage Road, existing drainage patterns will be maintained, generally traveling
from northeast to southwest. The north side of the road will contain a drainage swale that will channel sheet
flow from the north side of the existing site to one of two culverts. These culverts are sized to remain in place
and become part of a larger storm drain system when build out on the north side of the Frontage Road. An
imperviousness of 90% for the future site was used to calculate the ultimate flows for these culverts. The
culverts will be sufficient in conveying the minor events (2-yr and 10-yr), with the major events (100-yr)
overtopping the roadway. Stormwater will then travel through swales to the existing pond, maintaining existing
drainage patterns. Please see calculations in the attachments.
Page | 3
FIGURE 1
Vicinity Map
I-25
E. Prospect Rd.
Frontage Rd.
Page | 4
Floodplains
The FEMA designated Boxelder Creek Flood Zone exists to the west of the project site, as shown in Figure 2,
below. The proposed project will not involve the placement of any offsite project improvements within the
Boxelder Creek Flood Zone.
FIGURE 2
City Floodplain Map
(Floodplain shown is a FEMA-Designated Flood Zone)
Page | 5
Conclusions
The proposed grading concept closely matches the original drainage patterns and decreases overall site
imperviousness and additional detention is proven to be unnecessary. The drainage system is sufficiently
designed to handle existing drainage and to be utilized in the storm drain system when ultimate build out
occurs. Therefore, it is my professional opinion that SW Prospect & I-25 satisfies all applicable stormwater
criteria and will effectively limit potential damage associated with its stormwater runoff.
Please do not hesitate to contact me if you have questions or require additional information.
Sincerely,
Benjamin Ruch, P.E.
Project Engineer
ATTACHMENT 1
HYDROLOGIC CALCULATIONS
CHARACTER OF SURFACE:
Runoff
Coefficient
Percentage
Impervious Project: CSURF- I25/Prospect Road
Streets, Parking Lots, Roofs, Alleys, and Drives: Calculations By: B. Ruch
Asphalt ……....……………...……….....…...……………….………………………………….0.95 . 100% Date:
Concrete …….......……………….….……….………………..….………………………………… 0.95 90%
Gravel ……….…………………….….…………………………..……………………………….0.50 . 40%
Roofs …….…….………………..……………….…………………………………………….0.95 . 90%
Pavers…………………………...………………..…………………………………………….0.40 . 40%
Lawns and Landscaping
Sandy Soil ……..……………..……………….…………………………………………….0.15 . 0%
Clayey Soil ….….………….…….…………..………………………………………………. 0.25 0% 2-year Cf = 1.00 100-year Cf = 1.25
Basin ID
Basin Area
(ac)
Area of
Asphalt
(ac)
Area of
Concrete
(ac)
Area of
Roofs
(ac)
Area of
Gravel
(ac)
Area of
Pavers (ac)
Area of
Lawns and
Landscaping
(ac)
2-year
Composite
Runoff
Coefficient
10-year
Composite
Runoff
Coefficient
100-year
Composite
Runoff
Coefficient
Composite
% Imperv.
A 14.39 0.00 0.00 0.00 0.00 0.00 0.00 0.90 0.90 1.00 90%
B 22.57 0.00 0.00 0.00 0.00 0.00 0.00 0.90 0.90 1.00 90%
Total Onsite 36.96 0.00 0.00 0.00 0.00 0.00 0.00 0.90 0.90 1.00 90%
DEVELOPED COMPOSITE % IMPERVIOUSNESS AND RUNOFF COEFFICIENT CALCULATIONS
Runoff Coefficients are taken from the City of Fort Collins Storm Drainage Design Criteria and Construction Standards, Table 3-3. % Impervious taken from UDFCD USDCM, Volume I.
10-year Cf = 1.00
December 4, 2018
Overland Flow, Time of Concentration:
Project: CSURF- I25/Prospect Road
Calculations By:
Date:
Gutter/Swale Flow, Time of Concentration:
Tt
= L / 60V
Tc
= Ti
+ Tt
(Equation RO-2)
Velocity (Gutter Flow), V = 20·S
½
Velocity (Swale Flow), V = 15·S
½
NOTE: C-value for overland flows over grassy surfaces; C = 0.25
Is Length
>500' ?
C*Cf
(2-yr
Cf=1.00)
C*Cf
(10-yr
Cf=1.00)
C*Cf
(100-yr
Cf=1.25)
Length,
L
(ft)
Slope,
S
(%)
Ti
2-yr
(min)
Ti
10-yr
(min)
Ti
100-yr
(min)
Length,
L
(ft)
Slope,
S
(%)
Velocity,
V
(ft/s)
Tt
(min)
Length,
L
(ft)
Slope,
S
(%)
Velocity,
Rational Method Equation: Project: CSURF- I25/Prospect Road
Calculations By:
Date:
From Section 3.2.1 of the CFCSDDC
Rainfall Intensity:
Design
Point
Basin(s)
Area, A
(acres)
2-yr
Tc
(min)
10-yr
Tc
(min)
100-yr
Tc
(min)
C2 C10 C100
Intensity,
i2
(in/hr)
Intensity,
i10
(in/hr)
Intensity,
i100
(in/hr)
Flow,
Q2
(cfs)
Flow,
Q10
(cfs)
Flow,
Q100
(cfs)
Flow,
WQ
(cfs)
A A 14.39 21 21 21 0.90 0.90 1.00 1.59 2.71 5.53 20.5 35.0 79.6 10.27
B B 22.57 26 26 26 0.90 0.90 1.00 1.40 2.39 4.87 28.4 48.5 109.9 14.22
DEVELOPED RUNOFF COMPUTATIONS
B. Ruch
December 4, 2018
Rainfall Intensity taken from the City of Fort Collins Storm Drainage Design Criteria (CFCSDDC), Figure 3.1
Q = C f ( C )( i )( A )
Basin ID
Basin Area
(s.f.)
Basin Area
(ac)
Composite
% Imperv.
Flow,
WQ
(cfs)
Flow,
Q2
(cfs)
Flow,
Q100
(cfs)
A 627028 14.39 90% 10.27 20.53 79.60
B 983024 22.57 90% 14.22 28.43 109.90
Rational Summary (Proposed)
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ATTACHMENT 2
CULVERT AND SWALE SIZING
Channel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc. Friday, Dec 7 2018
West Swale - Culvert 2 - 2yr
Trapezoidal
Bottom Width (ft) = 2.00
Side Slopes (z:1) = 4.00, 4.00
Total Depth (ft) = 3.25
Invert Elev (ft) = 100.00
Slope (%) = 0.50
N-Value = 0.200
Calculations
Compute by: Known Q
Known Q (cfs) = 20.50
Highlighted
Depth (ft) = 2.58
Q (cfs) = 20.50
Area (sqft) = 31.79
Velocity (ft/s) = 0.64
Wetted Perim (ft) = 23.28
Crit Depth, Yc (ft) = 0.89
Top Width (ft) = 22.64
EGL (ft) = 2.59
0 5 10 15 20 25 30 35 40
Elev (ft) Depth (ft)
Section
99.00 -1.00
100.00 0.00
101.00 1.00
102.00 2.00
103.00 3.00
104.00 4.00
Reach (ft)
Channel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc. Friday, Dec 7 2018
West Swale - Culvert 2 - 10yr
Trapezoidal
Bottom Width (ft) = 2.00
Side Slopes (z:1) = 4.00, 4.00
Total Depth (ft) = 3.25
Invert Elev (ft) = 100.00
Slope (%) = 0.50
N-Value = 0.200
Calculations
Compute by: Known Q
Known Q (cfs) = 35.00
Highlighted
Depth (ft) = 3.20
Q (cfs) = 35.00
Area (sqft) = 47.36
Velocity (ft/s) = 0.74
Wetted Perim (ft) = 28.39
Crit Depth, Yc (ft) = 1.15
Top Width (ft) = 27.60
EGL (ft) = 3.21
0 5 10 15 20 25 30 35 40
Elev (ft) Depth (ft)
Section
99.00 -1.00
100.00 0.00
101.00 1.00
102.00 2.00
103.00 3.00
104.00 4.00
Reach (ft)
Channel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc. Friday, Dec 7 2018
East Swale - Culvert 3 - 2yr
Trapezoidal
Bottom Width (ft) = 2.00
Side Slopes (z:1) = 4.00, 4.00
Total Depth (ft) = 4.00
Invert Elev (ft) = 100.00
Slope (%) = 0.50
N-Value = 0.200
Calculations
Compute by: Known Q
Known Q (cfs) = 28.40
Highlighted
Depth (ft) = 2.95
Q (cfs) = 28.40
Area (sqft) = 40.71
Velocity (ft/s) = 0.70
Wetted Perim (ft) = 26.33
Crit Depth, Yc (ft) = 1.04
Top Width (ft) = 25.60
EGL (ft) = 2.96
0 5 10 15 20 25 30 35 40 45
Elev (ft) Depth (ft)
Section
99.00 -1.00
100.00 0.00
101.00 1.00
102.00 2.00
103.00 3.00
104.00 4.00
105.00 5.00
Reach (ft)
Channel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc. Friday, Dec 7 2018
East Swale - Culvert 3 - 10yr
Trapezoidal
Bottom Width (ft) = 2.00
Side Slopes (z:1) = 4.00, 4.00
Total Depth (ft) = 4.00
Invert Elev (ft) = 100.00
Slope (%) = 0.50
N-Value = 0.200
Calculations
Compute by: Known Q
Known Q (cfs) = 48.50
Highlighted
Depth (ft) = 3.65
Q (cfs) = 48.50
Area (sqft) = 60.59
Velocity (ft/s) = 0.80
Wetted Perim (ft) = 32.10
Crit Depth, Yc (ft) = 1.34
Top Width (ft) = 31.20
EGL (ft) = 3.66
0 5 10 15 20 25 30 35 40 45
Elev (ft) Depth (ft)
Section
99.00 -1.00
100.00 0.00
101.00 1.00
102.00 2.00
103.00 3.00
104.00 4.00
105.00 5.00
Reach (ft)
ATTACHMENT 3
DRAINAGE EXHIBIT
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STORMWATER MANAGEMENT PLAN (SWMP)
SW PROSPECT & I-25
Fort Collins, CO
December 19, 2018
Prepared for:
Colorado State University Research Foundation (CSURF)
2537 Research Blvd. #200
Fort Collins, CO 80526
Prepared by:
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
Phone: 970.221.4158 Fax: 970.221.4159
www.northernengineering.com
Project Number: 232-043
This Drainage Report is consciously provided as a PDF.
Please consider the environment before printing this document in its entirety.
When a hard copy is absolutely necessary, we recommend double-sided printing.
December 19, 2018
Colorado State University Research CA Ventures
2537 Research Blvd. #200
Fort Collins, CO 80526
RE: Stormwater Management Plan
SW Prospect & I-25
To Whom It May Concern:
Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan for the
SW Prospect & I-25 project. This report outlines Best Management Practices (BMPs) to be
implemented with the proposed construction in order to minimize potential pollutants in stormwater
discharges.
We have prepared this report to accompany the Colorado Department of Public Health and
Environment General Permit for Stormwater Discharge Associated with Construction Activities (aka,
Stormwater Discharge Permit or SDP). The General Permit No. for this SDP is (to be filled-in by
permittee) and the Certification No. for this SDP is (to be filled-in by permittee). The Permit
Certification is Effective beginning (to be filled-in by permittee), and initial certification expires (to be
filled-in by permittee). A copy of the issuance cover letter can be found in the Appendix D of this
document (to be provided by permittee).
Please note: this Stormwater Management plan (including the Site Maps) is not a static document.
It is a dynamic device that should be kept current and logged as construction takes place. As such,
this version was prepared to facilitate initial plan approvals and permitting, but does not necessarily
reflect the final version, or the transitions throughout the construction process. As the site develops
and changes, the Contractor is expected and encouraged to make changes to what is contained
herein so that the SWMP works as effectively and efficiently as possible. It shall be the
responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure
the plan is properly maintained and followed.
If you should have any questions or comments as you review this report, please feel free to contact
us at your convenience.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
Blaine Mathisen, EI
Project Engineer
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan
TABLE OF CONTENTS
Vicinity Map
1.0 General Requirements ................................................................................................ 1
1.1 Objectives .................................................................................................................. 1
1.2 SMWP Availability ...................................................................................................... 1
1.3 Definitions.................................................................................................................. 1
1.4 Additional Permitting ................................................................................................... 1
2.0 Narrative Site Description ........................................................................................... 2
2.1 Existing Site Description .............................................................................................. 2
2.2 Nature of Construction Activity ..................................................................................... 2
2.3 Sequence of Major Activities ......................................................................................... 2
2.4 Site Disturbance ......................................................................................................... 2
2.5 Existing Data .............................................................................................................. 2
2.6 Existing Vegetation ...................................................................................................... 2
2.7 Potential Pollution Sources ........................................................................................... 2
2.8 Non-stormwater discharges .......................................................................................... 3
2.9 Receiving Waters ........................................................................................................ 3
3.0 Stormwater Management Controls ............................................................................... 3
3.1 SWMP Administrator ................................................................................................... 3
3.2 Best Management Practices (BMP’s) for Stormwater Pollution Prevention.......................... 4
3.3 Structural Practices for Erosion and Sediment Control ..................................................... 4
3.4 Non-Structural Practices for Erosion and Sediment Control .............................................. 7
3.5 Phased BMP Installation .............................................................................................. 9
3.6 Material Handling and Spill Prevention ........................................................................ 10
3.7 Dedicated Concrete or Asphalt Batch Plant .................................................................. 11
3.8 Vehicle Tracking Control ............................................................................................ 11
3.9 Waste Management and Disposal ............................................................................... 11
3.10 Groundwater and Stormwater Dewatering .................................................................... 11
4.0 Final Stabilization and Long-Term Stormwater Management ........................................ 12
4.1 Final Stabilization ..................................................................................................... 12
4.2 Long-Term Stormwater Management ........................................................................... 12
4.3 BMP Inspection ........................................................................................................ 12
4.4 BMP Maintenance .................................................................................................... 13
4.5 Record Keeping ........................................................................................................ 13
5.0 Additional SWMP and BMP Resources ....................................................................... 15
References 16
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan
LIST OF TABLES:
Table 1 – Preliminary Permit and Construction Schedule ........................................................ 10
APPENDICES:
APPENDIX A – Site Maps
APPENDIX B – Erosion Control Details
APPENDIX C – Landscape Plan
APPENDIX D – Copies of Permits/Applications
APPENDIX E – Inspection Logs
APPENDIX F – Contractor Inserts (as needed)
APPENDIX G – Contractor Inserts (as needed)
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 1
1.0 General Requirements
1.1 Objectives
The objective of a Stormwater Management Plan (SWMP) is to identify all potential sources of
pollution likely to occur as a result of construction activity associated with the site construction, and
to describe the practices that will be used to reduce the pollutants in stormwater discharges from
the site. The SWMP must be completed and implemented at the time the project breaks ground,
and revised as necessary as construction proceeds to accurately reflect the conditions and practices
at the site.
This report summarizes the Stormwater Management Plan for the construction activity that will
occur with SW Prospect & I-25 in Fort Collins, CO. This plan has been prepared according to
regulations of the Colorado Department of Public Health and Environment (CDPHE), Water Quality
Control Division.
1.2 SMWP Availability
This report is intended to remain on the aforementioned construction site to allow for maintenance
and inspection updates, and for review during inspection.
1.3 Definitions
BMP – Best Management Practice encompassing a wide range of erosion and sediment control
practices, both structural and non-structural in nature, which are intended to reduce or eliminate
any possible water quality impacts from stormwater leaving a construction site.
Erosion Control BMPs – Practices that PREVENT the erosion of soil, such as minimizing the amount
of disturbed area through phasing, temporary stabilization, and preserving existing vegetation.
Sediment Control BMP’s – Practices to REMOVE sediment from runoff, such as sediment basins,
silt fence, or inlet protection.
Non-structural BMP’s – The implementation of methods, practices, and procedures to minimize
water quality impacts, such as the preservation of natural vegetation, preventive maintenance and
spill response procedures.
Structural BMP’s – Physical devices that prevent or minimize water quality impacts, such as
sediment basins, inlet protection, or silt fence.
1.4 Additional Permitting
As mentioned above, this Stormwater Management Plan is associated with the Colorado
Department of Public Health and Environment Stormwater Permit that is issued by the Water
Quality Control Division of the CDPHE. Additional Environmental permitting not described in this
report may be required as a part of this project. An example is the Construction Dewatering Permit
for groundwater. Another example is the Air Pollution Emission Notice (APEN). The CDPHE
website contains links to both of these permits, as well as many other potential permits. The
Contractor is responsible for ensuring the proper permits are acquired.
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 2
2.0 Narrative Site Description
2.1 Existing Site Description
The project is located at the southwest corner of Prospect and I-12 being part of Section 21 and
Section 22, Township 7 North, Range 68 West of the 6th P.M., City of Fort Collins, County of
Larimer, State of Colorado.
2.2 Nature of Construction Activity
The proposed project will be realigning the current frontage road that is adjacent to the west side of
I-25. The road will be placed in the ultimate location however the road section is just temporary.
The project will maintain historic flow patterns and rates.
2.3 Sequence of Major Activities
To complete the project, many basic categories of construction activity will take place. The first
part will be the removal of the existing infrastructure. A portion of the existing frontage road will be
getting removed as well as some associated fences. Once the existing infrastructure has been
removed the topsoil and native grasses that are currently on-site will be removed followed by overlot
grading. Next, utility installation will begin. New curb/gutter, paving, and sidewalks are expected to
begin after utility installation. Followed by some additional fine grading for the swales. The
aforementioned sequencing is an initial best guess and is subject to change at the Contractor’s
discretion.
2.4 Site Disturbance
The site disturbance will occur across roughly 7.20 acres. It is recommended that existing site
condition photos be taken prior to the demolition.
2.5 Existing Data
In order to complete the associated construction plans, a topographical survey of the site was
completed. This survey consisted of field measurements made by Northern Engineering in March
2013.
2.6 Existing Vegetation
The existing site vegetation consists of native grasses and invasive weeds. It is highly recommended
that pre-construction photos be taken to clearly document vegetative conditions prior any
disturbance activities.
2.7 Potential Pollution Sources
As is typical with most construction sites, there are a number of potential pollution sources which
could affect water quality. It is not possible for this report to identify all materials that will be used
or stored on the construction site. It is the sole responsibility of the Contractor to identify and
properly handle all materials that are potential pollution sources. The following are some common
examples of potential pollution sources:
• Exposed and stored soils
• Management of contaminated soils
• Off-site tracking of soils and sediment
Updated
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 3
• Loading and unloading operations
• Outdoor storage of building materials, fertilizers, chemicals, etc.
• Vehicle and equipment maintenance and fueling
• Significant dust or particulate generating processes
• Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc.
• On-site waste disposal practices (waste piles, dumpsters, etc.)
• Concrete truck/equipment washing
• Non-industrial waste sources that may be significant, such as worker trash and portable toilets
• Uncovered trash bins
• Other areas or procedures where potential spills can occur
• Stockpiling of materials that can be transported to receiving waterway(s)
Management of Contaminated Soils: We are not aware of on-site contaminated soils.
Loading and Unloading Operations: As site development and building construction progresses,
space constraints will limit the number of on-site locations for loading and unloading activities to
the building from Perennial Lane. The contractor will be responsible for the proper handling and
management of pollution sources during loading and unloading operations.
Dedicated Asphalt and Concrete Batch Plants: Neither a dedicated asphalt or concrete batch plant
will be constructed on-site.
2.8 Non-stormwater discharges
The Stormwater Construction Permit only covers discharges composed entirely of stormwater.
Emergency firefighting water is the only authorized exception. Concrete Washout water can NOT be
discharged to surface waters or to storm sewer systems without separate permit coverage. The
discharge of Concrete Washout water to the ground, under specific conditions, may be allowed by
the Stormwater Construction Permit when appropriate BMPs are implemented.
The discharge of pumped stormwater, ONLY, from excavations, ponds, depressions, etc. to surface
waters, or to a municipal storm sewer system is allowed by the Stormwater Construction Permit, as
long as the dewatering activity and associated BMPs are identified in the Stormwater Management
Plan (SWMP) and are implemented in accordance with the SWMP.
Aside from the exceptions noted above, non-stormwater discharges must be addressed in a separate
permit issued for that discharge. If groundwater is encountered, and dewatering is required, a
Construction Dewatering Permit must be acquired from the Colorado Department of Public Health
and Environment.
2.9 Receiving Waters
The property historically drains via overland flow from the northeast to the southwest across the lot.
The proposed development is in the City of Fort Collins Cooper Slough/Boxelder Master Basin.
Detention requirements for this basin are to detain the difference between the 100-year developed
inflow rate and the historic 2-year release rate.
3.0 Stormwater Management Controls
3.1 SWMP Administrator
Updated
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
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SW Prospect & I-25
Stormwater Management Plan 4
A SWMP Administrator must be designated in conjunction with the Stormwater Permit. This person
shall be responsible for developing, implementing, maintaining, and revising the SWMP. The
SWMP Administrator will also be the contact for all SWMP-related issues and will be the person
responsible for the accuracy, completeness, and implementation of the SWMP. The Administrator
should be a person with authority to adequately manage and direct day-to-day stormwater quality
management activities at the site.
The SWMP Administrator for this site is:
Name: (to be filled-in by permittee)
Company: (to be filled-in by permittee)
Phone: (to be filled-in by permittee)
E-mail: (to be filled-in by permittee)
3.2 Best Management Practices (BMP’s) for Stormwater Pollution Prevention
Beginning from mobilization, and throughout the entire construction of the project, erosion control
devices shall be installed to ensure minimal pollutant migration. These erosion control devices may
be installed in phases, or not at all, depending on actual conditions encountered at the site. It is
the responsibility of the Contractor to make the determination as to what practices should be
employed and when. In the event that a review agency deems BMPs to be insufficient, it shall be
the responsibility of the contractor to implement modifications as directed.
Best Management Practices (BMPs) are loosely defined as a method, activity, maintenance
procedure, or other management practice for reducing the amount of pollution entering a water
body. The term originated from rules and regulations in Section 208 of the Clean Water Act.
Details for Structural and Non-Structural BMPs have been included in Appendix B. These details
should be used for additional information on installation and maintenance of BMPs specified in this
report. It is also intended to serve as a resource for additional BMPs that may be appropriate for
the site that have not specifically been mentioned in the report.
3.3 Structural Practices for Erosion and Sediment Control
Structural BMPs are physical devices that are implemented to prevent erosion from happening or to
limit erosion once it occurs. These devices can be temporary or permanent, and installation of
individual components will vary depending on the stage of construction.
A table depicting construction sequence and BMP application/removal has been placed on the
“Dynamic Site Plan” to help document the implementation of these BMPs. Refer to the Stormwater
Management Plan Static Site Plan in the Appendix for the assumed location of all BMPs.
Construction Details for Temporary BMPs are located in the Appendix for reference.
Again, the final determination for which BMP’s will be installed, where they will be located, and
when they will be installed shall be made by the Contractor, along with all documentation
throughout the construction process.
Silt Fencing (Phase I)
Silt fencing shall be provided to prevent migration of sediment off-site or into adjacent properties.
All silt fencing shall be installed prior to any land disturbing activity (demolition, stockpiling,
stripping, grading, etc.). Silt fencing is to be installed prior to site excavation or earthwork
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 5
activities.
Inspections of the silt fence should identify tears or holes in the material, and should check for
slumping fence or undercut areas that allow flows to bypass the fencing. Damaged sections of the
silt fence should be removed to maintain BMP effectiveness, typically before it reaches a depth of 6
inches.
It is suggested that silt fencing be located along the western side of the proposed temporary
frontage road. Refer to the Erosion Control Plan (Sheet C6.00) for additional clarification.
Sediment Control Log – aka “Straw Wattles” (Phase I)
A Sediment Control Log is a linear roll made of natural materials, such as straw, coconut fiber, or
other fibrous material trenched into the ground and held with a wooden stake. Sediment Control
Logs can be used in many instances. Examples include perimeter control for stockpiles, as part of
inlet protection designs, as check dams in small drainage ways, on disturbed slopes to shorten flow
lengths, or in lieu of silt fencing (where appropriate).
Sediment Control Logs should be inspected for excess sediment accumulation. Sediment should be
removed prior to reaching half the height of the log.
At a minimum, Sediment Control Logs should be used around soil stockpiles (including landscape
material) and at all stormwater discharge locations other than inlets. There are several culverts that
will need sediment control logs on both the upstream and downstream sides. Refer to the Erosion
Control Plan (Sheet C6.00) for additional clarification.
Vehicle Tracking Control Pads (Phase I)
Vehicle tracking control pads shall be provided to minimize tracking of mud and sediment onto
paved surfaces and neighboring roadways. All vehicle tracking control pads shall be installed prior
to any land disturbing activity (demolition – as necessary, stockpiling, stripping, grading, etc.).
Location of vehicle tracking control pads will be located at any and all existing and future vehicle
accesses being used during any of the construction phases. These locations will primarily be
dictated by gates or openings in the temporary construction fencing that is expected to be installed.
Vehicle tracking control pads are to be installed prior to demolition (as appropriate), site excavation
or earthwork activities.
Vehicle tracking pads should be inspected for degradation and aggregate material should be
replaced as needed. If the area becomes clogged with water, excess sediment should be removed.
Aggregate material should remain rough, and at no point should aggregate be allowed to compact in
a manner that causes the tracking pad to stop working as intended.
Suggested locations for the vehicle tracking pad is at the start of the temporary road surface. Refer
to the Erosion Control Plan (Sheet C6.00) for additional clarification.
Inlet Protection (Phase I & II)
Inlet protection shall be provided for existing inlets to prevent sediment transport from adjacent
earthwork disturbance. Installation of these filters shall occur before adjacent earth disturbing
activities (Phase I implementation). Wattle type filters are to be implemented for new and existing
inlets where asphalt does not exist. For these inlets, if pavement is constructed adjacent to the
structure or if the area adjacent to the inlet is changed such that the wattle type filter is no longer
effective, it shall be the responsibility of the Contractor to ensure that an appropriate method is
used instead. For example, the wattle filter could be reused, or a gravel-block inlet filter may be
installed. It will be left to the discretion of the Contractor as to whether replacement of any inlet
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
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SW Prospect & I-25
Stormwater Management Plan 6
filter is necessary.
Inlet protection should be inspected regularly for tears that can result in sediment entering an inlet.
Inlet protection should also be inspected for sediment accumulation upstream of the inlet, and
sediment should be removed when the less than half of the capacity is available, or per
manufacturer specifications.
The Contractor shall provide inlet protection for all proposed inlets (six in total) as they are installed
(Phase II implementation). Refer to the Erosion Control Plan (Sheet C-600) for additional
clarification.
Erosion Control Blankets (Phase II)
A temporary degradable rolled erosion control product composed of natural flexible fibers shall be
used on all seeded slopes 3:1 and greater (excluding mulched shrub bed areas). Erosion control
blankets should be utilized to provide erosion control and to facilitate vegetation establishment.
During installation, it is important to ensure that no gaps or voids exist under the material and that
all corners of the material are secured using stakes and trenching. Stakes should be made of
materials that are biodegradable. Continuous contact between the product and the soil is necessary
to avoid failure.
Erosion Control Blankets should be inspected regularly for signs of erosion, including beneath the
mat. If voids are apparent, they should be filled with suitable soil. Inspections should also identify
loose or damaged stakes, as well as loose portions of the blanket. If deficiencies are found, they
should be repaired or replaced.
Concrete Washout Area (Phase II)
A concrete washout should be provided on the site. The washout can be lined or unlined excavated
pits in the ground, commercially manufactured prefabricated containers, or aboveground holding
areas. The concrete washout must be located a minimum of 400 feet from any natural drainage
way or body of water, and at least 1000 feet from any wells or drinking water sources. Washout
areas should not be located in an area where shallow groundwater may be present. Contractor
shall clearly show the desired location and access to the Concrete Washout Area on the Stormwater
Management Plan - Dynamic Site Plan. Contractor shall place a Vehicle Tracking Pad if the
selected location for the Concrete Washout Area is detached from pavement. Clear signage
identifying the concrete washout should also be provided.
The Concrete Washout Area should be inspected regularly. Particular attention should be paid to
signage to ensure that the area is clearly marked. Confirmation that the washout is being used
should also be noted to ensure that other undesignated areas of the site are not being used
incorrectly as a concrete washout.
It is suggested the Contractor build a concrete wash out pit for this project. It is recommended that
the concrete wash out pit be placed next to the vehicle tracking pad on the eastern side of the road.
This location is only a suggestion and can be relocated at the discretion of the Contractor.
Permanent/Established Vegetation (Phase IV)
Permanent or established vegetation and landscaping is considered a permanent form of sediment
and erosion control for common open spaces, steep slopes and areas not exposed to prolonged
scour velocities, or acute incipient motion bed shear stresses that will create soil erosion, rill
formation and subsequent sediment transport. Areas where the previous conditions apply will
contain sufficient permanent BMPs, such as riprap or cobble mulch. Permanent vegetation shall
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
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SW Prospect & I-25
Stormwater Management Plan 7
conform to the approved Landscape Plan prepared by TB Group. Permanent/Established vegetation
and hardscape defines Phase IV of development.
3.4 Non-Structural Practices for Erosion and Sediment Control
Non-Structural BMPs are practices or activities that are implemented to prevent erosion from
happening or to limit erosion once it occurs. These BMPs can be a practice resulting in physical
change to the site, such as mulching or slope stabilization. They can also result in behavioral
changes on the site, such as changes to construction phasing to minimize exposure to weather
elements, or increased employee awareness gained through training.
Protection of Existing Vegetation (Phases I-IV)
Protection of existing vegetation on a construction site can be accomplished through installation of a
construction fence around the area requiring protection. In cases where up-gradient areas are
disturbed, it may also be necessary to install perimeter controls to minimize sediment loading to
sensitive areas such as wetlands.
Trees that are to remain after construction is complete must be protected. Most tree roots grow
within the top 12”-18” of soil, and soil compaction is a significant threat to tree health. As such,
particular care should be taken to avoid activities within the drip-line of the tree. Direct equipment
damage should also be prevented. The most effective way to ensure the health of trees is to
establish a protection zone at the drip-line of the tree to prevent unintended activity in the area
directly surrounding the tree.
Fencing should be inspected and repaired when needed. If damage occurs to a tree, an arborist
should be consulted on how to care for the tree. If a tree is damage beyond repair, the City Forester
should be consulted on remediation measures.
At a minimum, protection to all trees identified for retention on the plans by TB Group.
Stockpile Management (Phases I-III)
Stockpile management should be utilized to minimize erosion and sediment transport from soil
stockpiles. In general, soil stockpiles should be located a minimum of 100 feet from any drainage
way and 50 feet from any storm sewer inlets. Where practical, choose a stockpile location that will
remain undisturbed for the longest period of time as the phases of construction progress. Sediment
control BMPs should be placed around the perimeter of the stockpile, and a designated access point
on the upstream side of the stockpile should be identified. BMPs such as surface roughening,
temporary seeding, mulching, erosion control blankets, or soil binders should be used to stabilize
the stockpile surface.
As a part of stockpile management, regular inspections of the perimeter controls should be
completed. If BMPs have been utilized to stabilize the surface of the stockpile, they should be
inspected and repaired as needed.
While soil stockpiles are not expected with this project, it is possible that foundation excavation or
the delivery landscaping material may generate temporary stockpiles. The location of any such
stockpiles shall be the responsibility of the SWMP Administrator.
Mulching (Phase I-III)
Mulching helps reduce erosion by protecting bare soil from rainfall impact, increasing infiltration,
and reducing runoff. Although often applied in conjunction with temporary or permanent seeding, it
can also be used for temporary stabilization of areas that cannot be reseeded due to seasonal
Removed.
No
landscape
plans for
this
submittal.
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 8
constraints. The most common type of mulch used is hay or grass that is crimped into the soil to
keep it secure. However, crimping may not be practical on slopes steeper than three to one
(3H:1V).
The Contractor shall mulch all planted areas within twenty-four (24) hours after planting. Only
weed-free and seed-free straw mulch may be used. Straw mulch should be applied at two (2) tons
per acre, and shall be adequately secured by crimping, tackifier, netting or blankets. Hydraulic
mulching may also be used on steep slopes or where access is limited. In the case that hydraulic
mulching is utilized, the Contractor shall use wood cellulose fibers mixed with water at two
thousands to two thousand five hundred (2,000-2,500) pounds per acre and organic tackifier at
one hundred to four hundred (100-400) pounds per acre.
The Contractor is responsible in applying wood chip mulch to all planted trees and shrubs as shown
on the Landscape Plan prepared by TB Group.
Wind Erosion/Dust Control (Phase I-IV)
Wind Erosion and Dust Control BMP’s help to keep soil particles from entering the air as a result of
land disturbing construction activities. Attached at the end of the Appendix B is the Fort Collins
Dust Prevention and Control Manual. The purpose of this manual is to establish minimum
requirements consistent with nationally recognize BMP’s for controlling fugitive dust emissions and
to describe applicable best management practices to prevent, minimize, and mitigate off-property
transport or off-vehicle transport of fugitive dust emissions pursuant to Chapter 12, Article X of the
Fort Collins City Code (§12-150 et. seq) for specific dust generating activities and sources.
Examples include use of a water truck or irrigation/sprinkler system to wet the top layer of disturbed
soil, seeding and mulching, soil binders, or wind fences.
Please refer to the last three pages of Appendix B for the Dust Control Plan. A Dust Control Plan is
required for all development projects or construction sites with greater than five (5) acres in size.
Street Sweeping (Phases I -IV)
Street sweeping should be used to remove sediment that has been tracked onto adjacent roadways.
Roadways should be inspected at least once a day, and sediment should be removed as needed. A
check of the area inlet protection should be completed after sweeping to ensure nothing was
displaced during sweeping operations. Street sweeping can reduce the sediment washed into the
existing storm drain system. Street sweeping may be necessary on the existing hardscape areas
which receive runoff from the disturbed areas.
Saw Cutting Pollution Prevention (Phase I)
The following protocol is recommended to prevent dust and slurry from asphalt and concrete saw
cutting activities from migrating into the existing storm drain system.
• Slurry and cuttings shall be vacuumed during cutting and surfacing operations
• Slurry and cuttings shall not remain on permanent concrete or asphalt pavement
overnight
• Slurry and cuttings shall not drain to any natural or constructed drainage conveyance
• Collected slurry and cuttings shall be disposed of in a manner that does not violate
groundwater or surface water standards
ADDRESS:
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Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 9
Good Housekeeping Practices (All phases)
Good housekeeping practices that will prevent pollution associated with solid, liquid, and hazardous
construction-related materials and wastes should be implemented throughout the project.
Examples of good housekeeping include providing an appropriate location for waste management
containers, establishing proper building material staging areas, designating paint and concrete
washout areas, establishing proper equipment/vehicle fueling and maintenance practices.
Development of a spill prevention and response plan is another example of Good Housekeeping
practices that should be used on the project. The following items are detailed examples of some of
the good housekeeping practices that should be utilized throughout the project. It should be noted
that a complete list of practices and detailed discussion regarding good housekeeping has been
included with Appendix B.
Street Sweeping and Vacuuming – Street sweeping and vacuuming should be used to remove
sediment that has been tracked onto adjacent roadways. Roadways should be inspected at least
once a day, and sediment should be removed as needed. A check of inlet protection should be
completed after sweeping to ensure nothing was displaced during sweeping operations.
Waste Management – Designate trash and bulk waste collection areas on-site. When possible,
materials should be recycled. Hazardous material waste should be segregated from other solid
waste. Waste collection areas should be located away from streets, gutters, watercourses, and
storm drains. Dumpsters should be located near site entrances to minimize traffic on disturbed
soils, and they should be placed on a level soil surface.
Establish Proper Building Material Handling and Staging areas – Clearly designate site areas for
staging and storage of building materials. Provide appropriate BMPs to ensure that spills or leaks
are contained.
Establish Proper Equipment/Vehicle Fueling and Maintenance Practices – If needed, create a
clearly designated on-site fueling and maintenance area that is clean and dry. Provide appropriate
BMPs to ensure that spills or leaks are contained.
3.5 Phased BMP Installation
It is important to recognize the four (4) major Development Phases as defined by the State of
Colorado’s Stormwater Discharge Permit (SDP). These four development phases (referred to as
Sequencing by the City of Fort Collins) have been distinguished to aid in the appropriate timing of
installation/implementation of BMPs at different stages of the construction process. These phases
are described as follows:
Phase I – Grading Stage; BMPs for initial installation of perimeter controls
Phase II – Infrastructure Stage; BMPs for utility, paving and curb installation
Phase III – Vertical Construction Stage; BMPs for individual building construction.
Phase IV – Permanent BMPs and final site stabilization.
The following is a rough estimate of the anticipated construction sequence for site improvements.
The schedule outlined below is subject to change as the project progresses and as determined by
the General Contractor.
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SW Prospect & I-25
Stormwater Management Plan 10
Table 1 – Preliminary Permit and Construction Schedule
Included in the back map pockets are two Site Plans: a “Static” Site Plan and a “Dynamic” Site
Plan. The “Static” plan serves to display the overall management plan all at once. However,
proper implementation of BMPs does not occur at once, and certain BMPs may move location in
the construction process; therefore, the “Dynamic” Site Plan is intended for the Contractor to write
in the BMP symbols to document the location and time the BMPs are installed and maintained
throughout the entire construction process.
3.6 Material Handling and Spill Prevention
Potential pollution sources, as discussed in earlier sections, are to be to be identified by the
Contractor. Spill prevention procedures are to be determined and put in place prior to construction
by the Contractor. A spill and flooding response procedure must also be determined and put in
place prior to construction by the Contractor. Additionally, steps should be taken to reduce the
potential for leaks and spills to come in contact with stormwater runoff, such as storing and
handling toxic materials in covered areas or by storing chemicals within berms or other secondary
containment devices.
A notification procedure must be put in place by the Contractor, by which workers would first notify
the site construction superintendent, who would then notify the SWMP Administrator. Depending
on the severity of the spill, the site construction superintendent and SWMP Administrator would
possibly notify the Colorado Department of Public Health and Environment - Water Quality Control
Division, downstream water users, or other appropriate agencies. The release of any chemical, oil,
petroleum product, sewage, etc., which enter waters of the State of Colorado (which include
surface water, ground water, and dry gullies or storm sewers leading to surface water) must be
reported immediately to the Division’s emergency spill reporting line at (877) 518-5608. All
spills that will require cleanup, even if the spill is minor and does not need to be reported to the
state, should still be reported to the City of Fort Collins Utilities office at 970-221-6700.
While not expected with this project, it will be the responsibility of the Contractor to designate a
fueling area and take the necessary precautions to ensure that no stormwater pollution occurs in the
event that a fueling area is needed. Fueling areas shall be located a minimum 100 feet from all
drainage courses. A 12-inch high compacted earthen ridge capable of retaining potential spills
shall enclose fueling areas. Other secondary containment devices can be used instead of the
earthen ridge. The area shall be covered with a non-porous lining to prevent soil contamination.
Printed instructions for cleanup procedures shall be posted in the fueling area and appropriate fuel
absorbents shall be available along with containers for used absorbents within the fueling area.
TASK
BEGINNING
DATE
ENDING DATE
"BMP-PHASE OF
DEVELOPMENT"
Development Construction Permit
Issued by City of Fort Collins
May 2019 May 2019 I
Overlot Grading (Demolition) May 2019 May 2019 I
Utility Installation May 2019 June 2019 II
Building Construction June 2019 February 2020 III
Final Stabilization January 2020 February 2020 IV
ADDRESS:
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Stormwater Management Plan 11
3.7 Dedicated Concrete or Asphalt Batch Plant
There are not any dedicated concrete or asphalt batch plants anticipated with this project. In the
event that a plant is needed, the Contractor should be aware that additional permitting will be
required. In particular, an Air Pollutant Emission Notice (APEN) will need to be obtained from the
CDPHE.
3.8 Vehicle Tracking Control
In addition to the vehicle tracking pads discussed previously, additional measures can be taken to
minimize and control sediment discharges from the site due to vehicle tracking. These measures
can include fencing around the site to control access points. Regular street sweeping can also be
used to minimize the transmission of sediment from the site due to vehicles leaving the site. The
use of gravel parking areas and wash racks can also be implemented to ensure minimal vehicle
tracking from the site.
3.9 Waste Management and Disposal
It will be the responsibility of the Contractor to designate a concrete truck chute washout area and
to clearly identify that area. Detailed information about the design and maintenance of the Concrete
Washout can be found under the Structural Practices section of this report. At no time should
untreated wash water be allowed to discharge from the site or to enter a storm drain system or
stream. Upon completion of construction activities the concrete washout material shall be removed
and properly disposed of prior to the area being restored.
Any waste material that currently exists on the site or that is generated by construction will be
disposed of in such a manner as to not cause pollutants in stormwater discharges. If waste is to be
stored on-site, it shall be in an area located a minimum of 100 feet from all drainage courses.
Whenever waste is not stored in a non-porous container, it shall be in an area enclosed by a 12-
inch high compacted earthen ridge or some other approved secondary containment device. The area
shall be covered with a non-porous lining to prevent soil contamination. Whenever precipitation is
predicted, the waste shall be covered with a non-porous cover, anchored on all sides to prevent its
removal by wind, in order to prevent precipitation from leaching out potential pollutants from the
waste. On-site waste disposal practices, such as dumpsters, should be covered or otherwise
contained as to prevent dispersion of waste materials from wind. It shall also be the responsibility
of the Contractor to maintain a clean jobsite as to prevent dispersion of waste material and potential
pollutants into adjacent properties or waterways.
This project is not known to have hazardous soil and groundwater on site.
The location of, and protective measures for, temporary restroom facilities shall be the responsibility
of the SWMP Administrator.
3.10 Groundwater and Stormwater Dewatering
The BMPs selected for construction dewatering vary depending on the site-specific features, such as
soils, topography, discharge quantities, and discharge location. Typically, dewatering involves
pumping water from an inundated area to a BMP, prior to the water being released downstream
into a receiving waterway, sediment basin, or well-vegetated area. Acceptable BMPs included
discharging water into a sediment trap or basin, using a dewatering filter bag, or using a series of
ADDRESS:
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Stormwater Management Plan 12
sediment logs. A settlement tank or an active treatment system can also be utilized. Another
commonly used method to handle the pumped water is the “sprinkler method,” which involves
applying the water to vegetated areas through a perforated discharge hose. Dispersal from a water
truck for dust control can also be used to disperse the pumped water.
4.0 Final Stabilization and Long-Term Stormwater Management
4.1 Final Stabilization
All disturbed areas will be seeded, crimped and mulched. Soil amendments such as compost, peat,
aged manure, or other similar materials, shall also be utilized. Soil amendments shall be tilled into
the soil to a minimum depth of 6”, and should comply with the requirements found in City Code
Section 12-132 (refer also to Land Use Code 3.8.21). As defined by the Colorado Department of
Public Health and Environment (CDPHE) in the General Permit Application for Stormwater
Discharges, “Final stabilization is reached when all soil disturbing activities at the site have been
completed, and uniform vegetative cover has been established with a density of at least 70 percent
of pre-disturbance levels or equivalent permanent, physical erosion reduction methods have been
employed.”
Table 2 - Native Grass Seed Mix
Preferred
Varieties
Seeded Rate
(lbs. per acre,
drilled)
PLS
Seeded/acre
Leymus Cinereus Great Basin Wilrye Mangar 3 285,000
Nassella Viridula Green Needlegrass Lodorm 2 362,000
Chnatherum Hymenoides Indian Ricegrass Paloma, Nezpar 1 188,000
Elymus Trachycaulus Slender Wheatgrass Primar, Revenue 2 320,000
Elymus Lanceolatus Thickspike Wheatgrass Critana 3 580,500
Pascopyrum Smithii Western Wheatgrass Arriba, Barton 4 504,000
Totals 15 2,239,500
Species
4.2 Long-Term Stormwater Management
By maintaining slopes less than 4:1 and maintaining the swales shall ensure that runoff is conveyed
to the proper treatment and detention facility as it has historically gone to.
4.3 BMP Inspection
All temporary erosion control facilities shall be inspected at a minimum of once every two (2) weeks
and after each significant storm event or snowmelt. Repairs or reconstruction of BMPs, as
necessary, shall occur as soon as possible in order to ensure the continued performance of their
intended function. It is the responsibility of the SWMP Administrator to conduct bi-weekly
inspections, maintain BMPs if needed, to keep records of site conditions and inspections, and to
update the SWMP as necessary.
The construction site perimeter, disturbed areas, all applicable/installed erosion and sediment
control measures, and areas used for material storage that are exposed to precipitation shall be
inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and
sediment control measures identified in the SWMP shall be observed to ensure that they are
operating correctly. Attention should be paid to areas that have a significant potential for
stormwater pollution, such as demolition areas, concrete washout locations, and vehicle entries to
the site. The inspection must be documented to ensure compliance with the permit requirements.
ADDRESS:
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PHONE: 970.221.4158
FAX: 970.221.4159
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4.4 BMP Maintenance
Any BMP’s not operating in accordance with the SWMP must be addressed as soon as possible,
immediately in most cases, to prevent the discharge of pollutants. If modifications are necessary,
such modifications shall be documented so that the SWMP accurately reflects on-site conditions.
The SWMP needs to accurately represent field conditions at all times.
Uncontrolled releases of mud, muddy water, or measurable amounts of sediment found off-site will
be recorded with a brief explanation of the measures taken to clean-up the sediment that has left
the site, as well as the measures taken to prevent future releases. This record shall be made
available to the appropriate public agencies (Colorado Department of Public Health and
Environment, Water Quality Control Division; Environmental Protection Agency; City of Fort Collins;
etc.) upon request.
Preventative maintenance of all temporary and permanent erosion control BMPs shall be provided
in order to ensure the continued performance of their intended function. Temporary erosion control
measures are to be removed after the site has been sufficiently stabilized as determined by the City
of Fort Collins. Maintenance activities and actions to correct problems shall be noted and recorded
during inspections.
Inspection and maintenance procedures specific to each BMP identified with this SWMP are
discussed in Section 3. Details have also been included with Appendix B.
4.5 Record Keeping
Documentation of site inspections must be maintained. The following items are to be recorded and
kept with the SWMP:
• Date of Inspection
• Name(s) and title(s) of personnel making the inspection
• Location(s) of sediment discharges or other pollutants from the site
• Location(s) of BMP’s that need to be maintained
• Location(s) of BMP’s that failed to operate as designed or proved inadequate
• Locations(s) where additional BMP’s are needed that were not in place at the time of inspection
• Deviations from the minimum inspection schedule
• Descriptions of corrective action taken to remedy deficiencies that have been identified
• The report shall contain a signed statement indicating the site is in compliance with the permit to the
best of the signer’s knowledge and belief after corrective actions have been taken.
Provided within Appendix E of this SWMP is an Example Inspection Log to aid in the record keeping
of BMP inspections and maintenance. Photographs, field notebooks, drawings and maps should be
included by the SWMP Administrator when appropriate.
In addition to the Inspection Log, records should be kept documenting:
• BMP maintenance and operation
• Stormwater contamination
• Contacts with suppliers
• Notes on the need for and performance of preventive maintenance and other repairs
• Implementation of specific items in the SWMP
• Training events (given or attended)
• Events involving materials handling and storage
• Contacts with regulatory agencies and personnel
• Notes of employee activities, contact, notifications, etc.
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 14
Records of spills, leaks, or overflows that result in the discharge of pollutants must be documented
and maintained. A record of other spills that are responded to, even if they do not result in a
discharge of pollutants, should be made. Information that should be recorded for all occurrences
includes the time and date, weather conditions, reasons for the spill, etc. Some spills may need to
be reported to authorities immediately. Specifically, a release of any chemical, oil, petroleum
product, sewage, etc., which may enter waters of the State of Colorado (which include surface
water, ground water and dry gullies or storm sewers leading to surface water) must be reported to
the CDPHE.
Additionally, the “Dynamic Site Plan” is intended to be a “living” document where the SWMP
Administrator can hand write the location of BMPs as they are installed to appropriately reflect the
current site conditions. Also on the “Dynamic Site Plan” is a “Table of Construction Sequence and
BMP Application/Removal” that the SWMP Administrator can use to document when BMPs were
installed or removed in conjunction with construction activities. These items have been included as
an aid to the SWMP Administrator, and other methods of record keeping are at his or her discretion.
This Stormwater Management Plan (both the text and map) is not a static document. It
is a dynamic device intended to be kept current and logged as construction takes place.
It shall be the responsibility of the SWMP Administrator and/or the permit holder (or
applicant thereof) to ensure the plan is properly maintained and followed. Diligent
administration is critical, including processing the Notice to Proceed and noting on the
Stormwater Management Plan the dates that various construction activities occur and
respective BMPs are installed and/or removed.
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 15
5.0 Additional SWMP and BMP Resources
Urban Drainage and Flood Control District
Urban Storm Drainage Criteria Manual - Volume 3 “Best Management Practices”
Colorado Department of Transportation
Erosion Control and Stormwater Quality Guide
BMP Field Academy
EPA Menu of BMP’s
Construction Site Storm Water Runoff Control
International Stormwater Best Management (BMP) Database
Rocky Mountain Education Center
Rocky Mountain Education Center
Red Rocks Community College, Lakewood
Keep It Clean Partnership
Boulder
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
SW Prospect & I-25
Stormwater Management Plan 16
References
1. Final Drainage Report for Willow Street Residences, Northern Engineering Services,
October 31, 2018 (NE Project No. 1290-001)
2. Soil Resource Report for Larimer County Area, Colorado, Natural Resources
Conservation Service, United States Department of Agriculture.
3. Subsurface Exploration Report Proposed 232 Willow Street 5-Story Mixed Use
Development, Earth Engineering Consultants LLC, February 23, 2018 (Project No.
1182008)
4. Urban Storm Drainage Criteria Manual, Volumes 1-3, Urban Drainage and Flood Control
District, Water Resources Publications, LLC., Denver, Colorado, Updated November
2010.
5. Soils Management Plan Schrader Shop Property, National Inspection Services, August
20th, 2018
APPENDIX A
SITE MAPS
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APPENDIX B
EROSION CONTROL DETAILS
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C6.01
EROSION CONTROL DETAILS
34
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
VEHICLE TRACKING CONTROL PAD SHALL BE LOCATED AT EVERY ACCESS POINT TO THE CONSTRUCTION SITE.
A SIGN SHALL BE PLACED NEXT TO THE VEHICLE TRACKING CONTROL PAD TO DESIGNATE THE LOCATION AS THE CONSTRUCTION ENTRANCE/EXIT.
VEHICLE TRACKING CONTROL PADS SHALL CONSIST OF HARD, DENSE, DURABLE STONE, ANGULAR IN SHAPE AND RESISTANT TO WEATHERING. ROUNDED STONE (i.e.
RIVER ROCK AND COBBLES) SHALL NOT BE USED. THE STONES SHALL BE A MINIMUM OF 3" AND A MAXIMUM OF 6" DIAMETER. THE STONES SHALL HAVE A SPECIFIC
GRAVITY OF AT LEAST 2.6. CONTROL OF GRADATION WILL BE BY VISUAL INSPECTION.
ANY CRACKED OR DAMAGED CURB AND GUTTER AND SIDEWALK SHALL BE REPLACED BY CONTRACTOR.
INSTALLATION NOTES:
1.
2.
3.
4.
CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL PAD DAILY. ROCK SURFACE SHALL BE CLEAN AND LOOSE ENOUGH TO RUT SLIGHTLY UNDER WHEEL
LOADS AND CAUSE LOOSE ROCK TO DISLODGE MUD FROM TIRES. WHEN ROCK BECOMES COMPACTED OR FILLED WITH SEDIMENT SO THAT THE EFFECTIVENESS OF
THE PAD IS DIMINISHED, CONTRACTOR SHALL RIP, TURN OVER, OR OTHERWISE LOOSEN ROCK, PLACE ADDITIONAL NEW ROCK, OR REPLACE WITH NEW ROCK AS
NECESSARY TO RESTORE EFFECTIVENESS.
SEDIMENT AND OTHER MATERIAL SPILLED, DROPPED OR TRACKED ONTO PAVED SURFACES SHALL BE REMOVED IMMEDIATELY OR BY THE END OF EACH WORKING
DAY.
VEHICLE TRACKING CONTROL PAD SHALL BE REMOVED AT THE END OF CONSTRUCTION. THE AREA SHOULD BE TOPSOILED, SEEDED, CRIMPED, AND MULCHED OR
OTHERWISE STABILIZED.
MAINTENANCE NOTES:
1.
2.
3.
CONSTRUCTION FENCE, TYP., TO DISCOURAGE
VEHICLE ACCESS EXCEPT AT VTC
SIGN "CONSTRUCTION ENTRANCE"
R=5'
20' MIN.
3" - 6" ROCK
APPENDIX F
CONTRACTOR INSERTS
APPENDIX G
CONTRACTOR INSERTS
Project Number: 232-043 Location: Fort Collins, CO
Date: December 17, 2018 Total Acres: 7.20
EROSION CONTROL MEASURE Units
Estimated
Quantity
Unit
Price
Total
Price
each 0 $100.00 $0.00
L.F. 1895 $1.10 $2,084.50
each 0 $125.00 $0.00
each 1 $300.00 $300.00
each 1 $200.00 $200.00
Straw Wattle each 29 $75.00 $2,175.00
acre 2.79 $1,000.00 $2,790.00
TOTAL = $7,549.50
TOTAL = $11,324.25
TOTAL = $10,800.00
REQUIRED AMOUNT OF SECURITY = $11,324.25
NOTE: 'Total Acres' represents total disturbed area.
COST TO VEGETATE: TOTAL ACRES x ($1000/acre) x 1.5
(WHICHEVER IS GREATER)
SW Prospect & I-25
Erosion Control Cost Estimate
Vehicle Tracking Control Pads
AMOUNT OF SECURITY = 1.5 x $7,549.50
Vegetate Landscaped Areas
Inlet Protection
Rock Socks
Concrete Washout Area
Silt Fence
- OR -
=
=
D:\Projects\232-043\Drainage\Reports\SWMP Report\232-043_Erosion-Escrow-Estimate.xls
Escrow has
been updated
PROSPECT ROAD
INTERSTATE 25
PROSPECT ROAD
BOXELDER DR.
CARRIAGE PKWY
KITCHELL WAY
SUMMIT VIEW DR.
DECEMBER 2018 CONTACT INFORMATION
Northern Engineering Services, Inc.
Cody Snowdon, PE
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
(970) 221-4158
Northern Engineering Services, Inc.
Bob Tessely, PLS
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
(970) 221-4158
PLANNER/
LANDSCAPE ARCHITECT
I hereby affirm that these final
construction plans were prepared
under my direct supervision, in
accordance with all applicable City
of Fort Collins and State of
Colorado standards and statutes,
respectively; and that I am fully
responsible for the accuracy of all
design. revisions, and record
conditions that I have noted on
these plans.
These plans have been reviewed by the City of Fort Collins for concept only. The review does not imply responsibility
by the reviewing department, the City of Fort Collins Engineer, or the City of Fort Collins for accuracy and correctness
of the calculations. Furthermore, the review does not imply that quantities of items on the plans are the final quantities
required. The review shall not be construed for any reason as acceptance of financial responsibility by the City of Fort
Collins for additional quantities of items shown that may be required during the construction phase.
DISCLAIMER STATEMENT:
CERTIFICATION STATEMENT:
PROJECT
LOCATION
VICINITY MAP
NORTH
OWNER
DEVELOPER/APPLICANT
SITE ENGINEER
SURVEYOR
PROJECT DATUM: NAVD88
City of Fort Collins benchmark 29-01
Located on the South side of Prospect Road, East of the intersection of the West frontage
road of I-25 and Prospect Road, East of the Colorado Welcome Center, on a concrete
headwall to an irrigation pipe.
Elevation=4904.41
City of Fort Collins benchmark 47-01
South side of Prospect Road where it intersects I-25, on the West end of the parapet wall to
the bridge (B 16 AM) over I-25 , on a Dept of Highways brass cap.
Elevation=4934.13
Please note: This plan set is using NAVD88 for a vertical datum. Surrounding developments
have used NGVD29 unadjusted (prior City of Fort Collins datum) for their vertical datums.
If NGVD29 unadjusted datum (prior City of Fort Collins datum) is required for any purpose, the
following equation should be used:
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
A. GENERAL NOTES
1. All materials, workmanship, and construction of ppublic improvements shall meet or exceed the standards and specifications set forth in the Larimer
County Urban Area Street Standards and applicable state and federal regulations. Where there is conflict between these plans and the specifications,
or any applicable standards, the most restrictive standard shall apply. All work shall be inspected and approved by the City of Fort Collins.
2. All references to any published standards shall refer to the latest revision of said standard, unless specifically stated otherwise.
3. These public improvement construction plans shall be valid for a period of three years from the date of approval by the City of Fort Collins Engineer.
Use of these plans after the expiration date will require a new review and approval process by the City of Fort Collins prior to commencement of any
work shown in these plans.
4. The engineer who has prepared these plans, by execution and/or seal hereof, does hereby affirm responsibility to the City of Fort Collins, as
beneficiary of said engineer's work, for any errors and omissions contained in these plans, and approval of these plans by the City of Fort Collins
Engineer shall not relieve the engineer who has prepared these plans of all such responsibility. Further, to the extent permitted by law, the engineer
hereby agrees to hold harmless and indemnify the City of Fort Collins, and its officers and employees, from and against all liabilities, claims, and
demands which may arise from any errors and omissions contained in these plans.
5. All storm sewer construction, as well as power and other "dry" utility installations, shall conform to the City of Fort Collins standards and specifications
current at the date of approval of the plans by the City of Fort Collins Engineer.
6. The type, size, location and number of all known underground utilities are approximate when shown on the drawings. It shall be the responsibility of the
Developer to verify the existence and location of all underground utilities along the route of the work before commencing new construction. The
Developer shall be responsible for unknown underground utilities.
7. The Developer shall contact the Utility Notification Center of Colorado (UNCC) at 1-800-922-1987, at least 2 working days prior to beginning
excavation or grading, to have all registered utility locations marked. Other unregistered utility entities (i.e. ditch / irrigation company) are to be located
by contacting the respective representative. Utility service laterals are also to be located prior to beginning excavation or grading. It shall be the
responsibility of the Developer to relocate all existing utilities that conflict with the proposed improvements shown on these plans.
8. The Developer shall be responsible for protecting all utilities during construction and for coordinating with the appropriate utility company for any utility
crossings required.
9. If a conflict exists between existing and proposed utilities and/or a design modification is required, the Developer shall coordinate with the engineer to
modify the design. Design modification(s) must be approved by the City of Fort Collins prior to beginning construction.
10. The Developer shall coordinate and cooperate with the City of Fort Collins, and all utility companies involved, to assure that the work is accomplished
in a timely fashion and with a minimum disruption of service. The Developer shall be responsible for contacting, in advance, all parties affected by any
disruption of any utility service as well as the utility companies.
11. No work may commence within any public storm water, sanitary sewer or potable water system until the Developer notifies the utility provider.
Notification shall be a minimum of 2 working days prior to commencement of any work. At the discretion of the water utility provider, a pre-construction
meeting may be required prior to commencement of any work.
12. The Developer shall sequence installation of utilities in such a manner as to minimize potential utility conflicts. In general, storm sewer and sanitary
sewer should be constructed prior to installation of the water lines and dry utilities.
13. The minimum cover over water lines is 4.5 feet and the maximum cover is 5.5 feet unless otherwise noted in the plans and approved by the Water
Utility.
14. A State Construction Dewatering Wastewater Discharge Permit is required if dewatering is required in order to install utilities or if water is discharged
into a storm sewer, channel, irrigation ditch or any waters of the United States.
15. The Developer shall comply with all terms and conditions of the Colorado Permit for Storm Water Discharge (Contact Colorado Department of Health,
Water Quality Control Division, (303) 692-3590), the Storm Water Management Plan, and the Erosion Control Plan.
16. The City of Fort Collins shall not be responsible for the maintenance of storm drainage facilities located on private property. Maintenance of onsite
drainage facilities shall be the responsibility of the property owner(s).
17. Prior to final inspection and acceptance by the City of Fort Collins, certification of the drainage facilities, by a registered engineer, must be submitted to
and approved by the Stormwater Utility Department. Certification shall be submitted to the Stormwater Utility Department at least two weeks prior to
the release of a certificate of occupancy for single family units. For commercial properties, certification shall be submitted to the Stormwater Utility
Department at least two weeks prior to the release of any building permits in excess of those allowed prior to certification per the Development
Agreement.
18. The City of Fort Collins shall not be responsible for any damages or injuries sustained in this Development as a result of groundwater seepage,
whether resulting from groundwater flooding, structural damage or other damage unless such damage or injuries are sustained as a result of the City
of Fort Collins failure to properly maintain its water, wastewater, and/or storm drainage facilities in the development.
19. All recommendations of the Drainage Report by Northern Engineering, dated December 24, 2018, shall be followed and implemented.
20. Temporary erosion control during construction shall be provided as shown on the Erosion Control Plan. All erosion control measures shall be
MODIFIED MINOR COLLECTOR
TEMPORARY FRONTAGE ROAD
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C0.02
& TYPICAL ROADWAY SECTION
ELCO & BOXELDER GENERAL NOTES
3
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
UTILITY PLAN APPROVAL
BOXELDER SANITATION DISTRICT
EAST LARIMER COUNTY WATER DISTRICT
UTILITY PLAN REVIEW
F. BOXELDER GENERAL NOTES
1. Existing Utility Locates: It shall be the responsibility of the Contractor to coordinate field locates of all existing utilities prior
to commencement of any construction. Contractor shall also notify all affected utility companies prior to commencing
construction. In the event of damage to any existing utility, the contractor shall immediately notify the owner of the utility
involved and unless authorized in writing by the owner of the subject utility, shall not attempt to make repairs. The cost of
repairs shall be the responsibility of the Contractor.
2. District Owned Easement Pictures: Contractor to provide sequential digital pictures spaced at no more than 300 feet
detailing conditions of the off-site Boxelder Owned Easement Conditions and any structures that could be affected, to the
District and the property owner prior to the start of any off-site work. These pictures shall include all existing fence, ditches,
ditch structures, out buildings, water troughs, trees and all other landscaping. Pictures are to be placed at no more than
four (4) pictures on a 11x8 sheet of photo paper inserted into transparent sleeves and delivered with the drawings of record
in a three (3) ring binder.
3. Protection of Property: Contractor shall continuously maintain adequate protection from damage of all public and private
property through which the work is done.
4. Safety: All sewer main installation within the District shall be subject to current (Occupational Safety and Heath Association
(OSHA) and the Colorado Safety Association, (CSA) safety requirements. Contractor shall also comply with any and all
requirements and regulations as set forth by City, County, State and Federal agencies having applicable authority.
5. Start of Construction: No construction shall begin without prior design review of the District. The District shall be notified 48
hours in advance of starting construction or testing to allow for scheduling.
6. Road Excavation Permits: In event that State, County or City road excavation permit(s) are required, the Contractor is
responsible for obtaining all road permits which may be required.
7. Other Permits: The Contractor shall be responsible for obtaining all permits required for construction.
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CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C6.01
EROSION CONTROL DETAILS
34
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
VEHICLE TRACKING CONTROL PAD SHALL BE LOCATED AT EVERY ACCESS POINT TO THE CONSTRUCTION SITE.
A SIGN SHALL BE PLACED NEXT TO THE VEHICLE TRACKING CONTROL PAD TO DESIGNATE THE LOCATION AS THE CONSTRUCTION ENTRANCE/EXIT.
VEHICLE TRACKING CONTROL PADS SHALL CONSIST OF HARD, DENSE, DURABLE STONE, ANGULAR IN SHAPE AND RESISTANT TO WEATHERING. ROUNDED STONE (i.e.
RIVER ROCK AND COBBLES) SHALL NOT BE USED. THE STONES SHALL BE A MINIMUM OF 3" AND A MAXIMUM OF 6" DIAMETER. THE STONES SHALL HAVE A SPECIFIC
GRAVITY OF AT LEAST 2.6. CONTROL OF GRADATION WILL BE BY VISUAL INSPECTION.
ANY CRACKED OR DAMAGED CURB AND GUTTER AND SIDEWALK SHALL BE REPLACED BY CONTRACTOR.
INSTALLATION NOTES:
1.
2.
3.
4.
CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL PAD DAILY. ROCK SURFACE SHALL BE CLEAN AND LOOSE ENOUGH TO RUT SLIGHTLY UNDER WHEEL
LOADS AND CAUSE LOOSE ROCK TO DISLODGE MUD FROM TIRES. WHEN ROCK BECOMES COMPACTED OR FILLED WITH SEDIMENT SO THAT THE EFFECTIVENESS OF
THE PAD IS DIMINISHED, CONTRACTOR SHALL RIP, TURN OVER, OR OTHERWISE LOOSEN ROCK, PLACE ADDITIONAL NEW ROCK, OR REPLACE WITH NEW ROCK AS
NECESSARY TO RESTORE EFFECTIVENESS.
SEDIMENT AND OTHER MATERIAL SPILLED, DROPPED OR TRACKED ONTO PAVED SURFACES SHALL BE REMOVED IMMEDIATELY OR BY THE END OF EACH WORKING
DAY.
VEHICLE TRACKING CONTROL PAD SHALL BE REMOVED AT THE END OF CONSTRUCTION. THE AREA SHOULD BE TOPSOILED, SEEDED, CRIMPED, AND MULCHED OR
OTHERWISE STABILIZED.
MAINTENANCE NOTES:
1.
2.
3.
CONSTRUCTION FENCE, TYP., TO DISCOURAGE
VEHICLE ACCESS EXCEPT AT VTC
SIGN "CONSTRUCTION ENTRANCE"
R=5'
20' MIN.
3" - 6" ROCK
NO MATERIALS INCLUDING 2x4'S, PIPES,
DIRT, GRAVEL OR ASPHALT, SHALL BE
PLACED IN GUTTER TO FACILITATE
MOUNTING CURB; HOWEVER, CURB MAY BE
CUT DOWN TO A HEIGHT OF 2" OR HIGHER
FOR EASIER ACCESS AND REPLACED AT
PROJECT COMPLETION. OTHER ACCESS
DEVICES MAY BE USED AS ACCEPTED BY
THE CITY.
CURB CUT
50' MIN.
2" MIN. 6" MIN.
6" MIN.
ALTHOUGH NOT NORMALLY USED, THE CITY RESERVES THE RIGHT TO REQUIRE VEHICLE TRACKING CONTROL WITH A TEMPORARY CATTLE GUARD
AND/OR WHEEL WASH FACILITIES AT SITES WHERE TRACKING ONTO PAVED AREAS BECOMES A SIGNIFICANT PROBLEM AS DETERMINED BY THE CITY
INSPECTOR.
IF VEHICLE TRACKING CONTROL WITH WHEEL WASH FACILITIES ARE REQUIRED, ALL WHEELS ON EVERY VEHICLE LEAVING THE SITE SHALL BE
CLEANED OF MUD USING A PRESSURE-WASHER. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING A WATER SOURCE AND CONSTRUCTING
A WASHWATER SEDIMENT TRAP.
5.
6.
IF VEHICLE WHEEL WASH FACILITIES ARE REQUIRED, CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL AND WHEEL WASH FACILITIES DAILY.
ACCUMULATED SEDIMENTS SHALL BE REMOVED FROM THE PAD SURFACE.
ACCUMULATED SEDIMENT IN THE WASHWATER/SEDIMENT TRAP SHALL BE REMOVED WHEN THE SEDIMENT REACHES AN AVERAGE DEPTH OF 12-INCHES.
4.
5.
VTC
CONCRETE WASHOUT AREA
VEHICLE TRACKING CONTROL PAD SILT FENCE/PERIMETER PROTECTION
POSTS
PREASSEMBLED SILT FENCE POSTS SHALL OVERLAP
AT JOINTS SO THAT NO
GAPS EXIST IN SILT FENCE.
NOTE:
THICKNESS OF GEOTEXTILE
POST SHALL BE JOINED AS SHOWN, THEN HAS BEEN EXAGGERATED.
ROTATED 180° IN DIRECTION SHOWN AND
DRIVEN INTO THE GROUND.
SILT FENCE JOINTS
DRIVE POSTS VERTICALLY INTO THE GROUND TO A MINIMUM DEPTH OF 18".
EXCAVATE A TRENCH APPROXIMATELY 4" WIDE AND 4" DEEP ALONG THE
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
ANCHOR TRENCH SHALL BE EXCAVATED BY HAND, WITH TRENCHER, OR
WITH SILT FENCE INSTALLATION MACHINE. NO ROAD GRADERS, BACKHOES,
ETC. SHALL BE USED.
NOT LESS THAN THE BOTTOM 1' OF THE SILT FENCE FABRIC SHALL BE
BURIED IN THE TRENCH.
THE TRENCH SHALL BE COMPACTED BY HAND, WITH "JUMPING JACK" OR BY
WHEEL ROLLING. COMPACTION SHALL BE SUCH THAT THE SILT FENCE
RESISTS BEING PULLED OUT OF ANCHOR TRENCH BY HAND.
SILT FENCE INDICATED IN THE PLANS SHALL BE INSTALLED PRIOR TO ANY
LAND-DISTURBING ACTIVITIES.
USE WOOD POSTS OR OTHER MATERIAL AS ACCEPTED BY THE CITY.
INSTALLATION NOTES:
1.
2.
3.
4.
5.
6.
7.
THE CONTRACTOR SHALL INSPECT SILT FENCE EVERY TWO WEEKS AND
AFTER SIGNIFICANT STORM EVENTS AND MAKE REPAIRS OR CLEAN OUT
UPSTREAM SEDIMENT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF SILT FENCE SHALL BE REMOVED
WHEN THE UPSTREAM SEDIMENT REACHES A DEPTH OF 6".
SILT FENCE SHALL BE REMOVED WHEN THE UPSTREAM DISTURBED AREA IS
STABILIZED AND GRASS COVER IS ACCEPTED BY THE CITY. IF ANY
DISTURBED AREA EXISTS AFTER REMOVAL, IT SHALL BE SEEDED AND
MULCHED OR OTHERWISE STABILIZED IN A MANNER ACCEPTED BY THE CITY.
MAINTENANCE NOTES:
1.
2.
3.
4" MIN.
4" MIN.
1
1
2" x 1
1
2" WOODEN FENCE POSTS
SF SF
SWALE WATTEL DIKE
SOIL RIPRAP INSTALLATION
NOTES
1. CONCRETE WASHOUT AREA SHALL BE
INSTALLED PRIOR TO ANY CONCRETE
PLACEMENT ON SITE.
2. VEHICLE TRACKING CONTROL IS REQUIRED IF
ACCESS TO CONCRETE WASHOUT AREA IS OFF
PAVEMENT.
3. SIGNS SHALL BE PLACED AT THE
CONSTRUCTION ENTRANCE, AT THE WASHOUT
AREA, AND ELSEWHERE AS NECESSARY TO
CLEARLY INDICATE THE LOCATION OF THE
CONCRETE WASHOUT AREA TO OPERATORS
OF CONCRETE TRUCKS AND PUMP RIGS.
4. THE CONCRETE WASHOUT AREA SHALL BE
REPAIRED AND ENLARGED OR CLEANED OUT
AS NECESSARY TO MAINTAIN CAPACITY FOR
WASTED CONCRETE.
5. THE CONCRETE WASHOUT SHOULD BE
EMPTIED WHEN HALF OF TOTAL HOLDING
CAPACITY HAS BEEN REACHED.
6. AT THE END OF CONSTRUCTION, ALL
CONCRETE SHALL BE REMOVED FROM THE
SITE AND DISPOSED OF AT AN ACCEPTED
WASTE SITE.
7. WHEN THE CONCRETE WASHOUT AREA IS
REMOVED, THE DISTURBED AREA SHALL BE
SEEDED AND MULCHED OR OTHERWISE
STABILIZED IN A MANNER ACCEPTED BY THE
CITY.
8. LOCATION OF CONCRETE WASHOUT AREA IS
CONCEPTUAL ONLY. FINAL LOCATION TO BE
DETERMINED IN THE FIELD AT CONTRACTOR'S
DISCRETION.
3H:1V OR FLATTER
SIDE SLOPES
12" MIN
8'x 8' MIN
OR AS REQUIRED TO
CONTAIN WASTE CONCRETE
12" 2'-0" MIN.
COMPACTED EMBANKMENT
MATERIAL, TYP.
BERM AROUND PERIMETER
GROUND SURFACE
SIGN TO INDICATE THE
LOCATION OF THE
CONCRETE WASHOUT AREA
*IMPERMEABLE LINER MAY BE NEEDED
IF GROUND WATER IS ENCOUNTERED.
RP
005
002
001
003 004
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SW FRONTAGE ROAD
INTERSTATE 25
PROPOSED
CULVERT
PROPOSED
CULVERT
PROPOSED
CULVERT
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF SF
SF
SF
SF
C
ALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
NORTH
( IN FEET )
1 inch = ft.
80 0 80 Feet
80
160 240
KEYMAP
F SE
M
VAULT
ELEC
INTERSTATE 25
PROSPECT ROAD
MCLAUGHLIN LN
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C6.00
EROSION CONTROL PLANS
33
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
1. IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES
ONLY AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR
PHASING OF BEST MANAGEMENT PRACTICES (BMPs) IS EXPECTED.
ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY
DEPICTED MAY BE NECESSARY DURING CONSTRUCTION DUE TO
CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2. THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH,
GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY
NECESSARILY SHOWN IN THEIR EXACT LOCATION.
3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING
(CITY, STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH
GOVERNING AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF
THE CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION
CONTROL MEASURES ARE PROPERLY MAINTAINED AND FOLLOWED.
4. CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION
CONTROL MEASURES ACCORDING THE THE CONSTRUCTION
SEQUENCING AND LEVEL OF SITE STABILIZATION.
5. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL
SITE IS FULLY STABILIZED.
6. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM,
UNTIL CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7. INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE
SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN
WATTLES FOR BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR
PAVEMENT, ETC.)
8. CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES,
PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING,
HYDRO MULCHING, EROSION MATS, TEMPORARY IRRIGATION, AND
ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO
ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
9. ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE
NECESSARY TO INSURE THAT EACH BUILDING PAD IS STABILIZED
THROUGHOUT CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE
ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
10. CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER
PROTECTION FOR AREAS DIRECTING DRAINAGE OFFSITE.
PERIMETER PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO
THE SURROUNDING SURFACE TYPE AND CONDITION (i.e.,
STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE
SOIL, SAND BAGS OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
11. FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED
(100) FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL
DRAINAGE WAY OR MANMADE DRAINAGE WAY. THE FUEL TANKS
AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT
WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW, SEEP, RUN OFF,
OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
12. CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE
SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT
LEAST FIFTY (50) FEET FROM ANY STORMWATER INLET, WETLAND,
OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF
WATER, WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE
LOCATED ON FLAT, STABLE GROUND, AND CONSTRUCTION TOILETS
SHALL BE STAKED DOWN.
13. THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE
WITH THE CITY'S CONSTRUCTION INSPECTORS BY CEASING
OPERATIONS WHEN WINDS ARE OF SUFFICIENT VELOCITY TO
CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS
HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
14. WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND
WINTER MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS,
DISTURBED AREAS WILL BE TREATED WITH MULCH AND MULCH
TACKIFIER OR OTHER MATERIALS APPROVED BY EROSION CONTROL
STAFF TO PREVENT EROSION.
15. SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON
PLANTING, REVEGETATION, HARDSCAPE AND OTHER PERMANENT
SITE STABILIZATION METHODS.
TABLE OF CONSTRUCTION SEQUENCE AND BMP EROSION CONTROL NOTES:
APPLICATION
CONSTRUCTION PHASE
(DESCRIPTION)
PHASE I
(GRADING)
PHASE II
(INFRASTRUCTURE)
PHASE III
(VERTICAL
CONSTRUCITON)
PHASE IV
(PERMANENT
BMP'S)
Grading (Include Offsite)
Overlot
Pipeline Installation
Stormwater
Concrete Installation
Site Walls
Building Structure
Miscellaneous
Hardscape Amenities
BEST MANAGEMENT PRACTICES
Temporary
Inlet Protection (IP)
Vehicle Tracking Control (VTC)
Flow Barriers (Wattles, Rock Socks, etc.) (RS)
Concrete Washout Area (CWA)
Preventative Maintenance Activities/Meetings/etc.
Silt Fence (SF)
Permanent
Mulching/Sealant
Permanent Seed Planting
Sewer Service
Water Service
Curb and Gutter
Rip Rap (RP)
Erosion Control Fabric (EF)
C6.00
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPERTY BOUNDARY
BENCHMARK/BASIS OF BEARING:
SILT FENCE SF SF
RIPRAP w/ TURF REINFORCEMENT MAT RP
1. CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2. SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3. CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4. REFER TO THE DRAINAGE REPORT BY NORTHERN ENGINEERING, DATED
DECEMBER 24, 2018 BY NORTHERN ENGINEERING FOR ADDITIONAL
INFORMATION.
GENERAL NOTES:
WATTLE DIKE WD
CONCRETE WASH AREA CWA
VERTICAL TRACKING CONTROL VTC
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 29-01
LOCATED ON THE SOUTH SIDE OF PROSPECT ROAD, EAST OF THE
INTERSECTION OF THE WEST FRONTAGE ROAD OF I-25 AND PROSPECT ROAD,
EAST OF THE COLORADO WELCOME CENTER, ON A CONCRETE HEADWALL TO
AN IRRIGATION PIPE.
ELEVATION=4904.41
CITY OF FORT COLLINS BENCHMARK 47-01
SOUTH SIDE OF PROSPECT ROAD WHERE IT INTERSECTS I-25, ON THE WEST
END OF THE PARAPET WALL TO THE BRIDGE (B 16 AM) OVER I-25 , ON A DEPT
OF HIGHWAYS BRASS CAP.
ELEVATION=4934.13
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM.
SURROUNDING DEVELOPMENTS HAVE USED NGVD29 UNADJUSTED (PRIOR
CITY OF FORT COLLINS DATUM) FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS
REQUIRED FOR ANY PURPOSE, THE FOLLOWING EQUATION SHOULD BE USED:
NGVD29 (PRIOR CITY OF FORT COLLINS DATUM) = NAVD88 - 3.19'
BASIS OF BEARINGS
BASIS OF BEARINGS IS THE NORTH LINE OF THE NORTHEAST QUARTER OF
SECTION 21, TOWNSHIP 7 NORTH, RANGE 68 WEST OF THE 6TH P.M. AS
BEARING NORTH 88° 21' 24" WEST (ASSUMED BEARING).
8. Revisions: No verbal authorization for field revision shall be given. All requests for field revision shall be made in writing
accompanied by proposed change indicated on copy of the approved design drawings. Any field revision approved and
installed shall also be accurately documented on the Drawings of Record.
9. Materials: Plastic Pipe -All gravity sanitary sewer piping shall be Polyvinyl Chloride (PVC) unless otherwise noted on the
approved drawings. Pipe 15” and smaller shall conform to ASTM D3034, Type PSM, and SDR 35. Pipe 18” and larger
shall conform to ASTM F679. All fittings shall be (PVC) unless otherwise noted.
10. Pipe Cover: A minimum cover of 3-1/2 feet of cover shall be maintained throughout the sewer line and service line
installation.
11. Bedding: All sewer main installation shall include bedding. Bedding shall be ¾” washed rock uniformly graded and
compacted. Refer to force main desgin for force main bedding requirements. Trench shall be excavated to a depth below
established grade equal to ¼ of pipe diameter (min. 4”). Bell depressions shall be provided for all joints. In event that
unstable trench conditions are encountered at pipeline grade 1-1/2” uniformly graded washed rock shall be used for
stabilization. Bedding material shall be placed and compacted under and around sides of the pipe. Place bedding in such a
manner as to provide solid, uniform bearing surface for full length of barrel. Minimum 30” initial lift above pipe before other
than hand compaction equipment is to be used. Note maximum trench width detail.
12. Backfill: Backfilling of trench shall be performed as soon as practical, subsequent to inspection and approval. Backfilling of
acceptable material shall not be placed in lifts of greater than one (1) foot. Backfill shall be compacted to 95% of optimum
density in roadway and residential areas and 90% in all off-site easement areas unless otherwise noted. Compaction
testing of bedding and back fill shall be at least five tests per 1,000 feet and at varying depths and locations in accordance
with the requirements of the applicable authority or as required in project specific specifications.
13. Concrete: All concrete construction shall be completed utilizing 3,000 psi at twenty-eight (28) days or equal concrete.
14. Pavement or Other Repairs: In event that asphalt or concrete pavement, sidewalks, storm sewers, waterline or any other
public or privately owned property is damaged or requires reconstruction due to the work, repairs or replacement will be
made in accordance with the requirements of the appropriate governing authority. Private property will be returned to its
original condition or as close to original condition as reasonably possible, unless otherwise noted on the drawings.
15. Service Taps on Existing Lines: All taps made on existing lines shall be completed at developer's expense by District
personnel or the District's authorized contractor with no exception.
16. Inspection: Construction shall conform to District Standards and Specifications or project specific specifications at all times.
The District shall inspect the construction as necessary and shall observe all line testing. The District shall have the
authority to ascertain that all construction of facilities is equal to or better than minimum construction requirements as set
forth in
17. Testing: All lines shall be pressure tested and flushed by the Contractor in accordance with District Standards and
Specifications and under the District's supervision. Upon passing, copies of all passing test results including soils
compaction in the area of sewer main construction shall be provided to the District.
18. Acceptance: Upon completion of all utility construction (sewer and other) and fulfillment of all District requirements,
preliminary acceptance of new sewer system improvements will occur in accordance with District's acceptance procedure.
19. Warranty: The Contractor shall warrant the materials, installation, workmanship and surface restoration for a period of two
years from date of preliminary acceptance. During this warranty period the Developer shall promptly repair any defects in
the work and maintain the work area. At the close of the two-year warranty period the District will make a field inspection.
Upon satisfactory correction of any deficiencies noted the District would make final acceptance of the lines and work. The
lines and the appurtenances shall then become the sole property and responsibility of Boxelder Sanitation District.
20. Drawings of Record and Total Costs: Within 90 days of preliminary acceptance of the new facilities, the District shall be
provided with acceptable Drawings of Record of the complete system consisting of two sets of fill size reproduced prints,
two sets of ½-size reproduced prints, one set of 6 mil double matted reproducible mylars and one complete digital file
equivalent (software and version to be confirmed at time of delivery). Written confirmation of the total cost of all sewer
system improvements shall also be submitted with the Drawings of Record.
E. EAST LARIMER COUNTY WATER DISTRICT TYPICAL SECTIONS
GENERAL NOTES FOR CONSTRUCTION
Version: 10/10/2017
The following information is condensed from the current "Standard Construction Specifications for Water Mains" (Specification) as
adopted by the East Larimer County Water District (‘ELCO’ or ‘District’) and is to be considered as such. In the event of any
conflict the full District Specification document shall take precedence over these general notes.
1. Standards and Specifications: Construction shall be per the District Specifications in effect at the start of construction.
Material or equipment shall be manufactured per the most recent version of applicable industry standards
2. Locates: Contractor shall coordinate field locates of all existing utilities prior to commencement of any construction and as
required notify all affected utility companies prior to commencing construction. Cost of repairs to any other utility damaged
during District waterline installation shall be the responsibility of the Contractor.
3. Damage to Property: Contractor shall continuously maintain adequate protection from damage of all public and private
property through which the work is done and shall be fully responsible for all costs associated with damage to any and all
other public and private property.
4. Safety: Contractor shall comply with any and all requirements and regulations as set forth by City, County, State and Federal
agencies having applicable authority.
5. Landscaping Adjacent to District Waterlines: No landscaping (bushes, shrubs, trees or other plantings) that has a mature
height of over 3 feet (3-ft) shall be placed within ten feet (10-ft) of any District waterline or appurtenance (distribution main,
service line, fire hydrant, meter, etc.). Bushes or shrubs with a mature height of less than 3-ft shall be placed a minimum 4-ft
from any District waterline or appurtenance. The District shall have the right to remove any landscaping that violates this
standard, at any time such landscaping is discovered, and shall not be required to replace the removed landscaping.
6. Design Approval and Construction Start: No construction shall begin without prior design approval from ELCO. District shall
be notified 48 hours in advance of starting construction or testing to allow for scheduling.
7. Permits: Contractor is responsible for obtaining all County road permits which may be required. For any permitting where
the District must apply for a permit the Contractor shall coordinate, cover the cost and schedule the permit acquisition with
the District.
8. Changes During Construction: No verbal authorization for field revision shall be given. All requests for such field revision
shall be made in writing accompanied by proposed change indicated on copy of the approved design drawings. Any field
revision approved and installed shall also be accurately documented on the Contrctor’s As-Built drawings.
9. Materials of Construction:
a. Pipe: All water piping shall be Polyvinyl Chloride (PVC). All PVC piping 6-inch through 12-inch shall be DR 18 (pressure
class 235 psi) and manufactured in accordance with AWWA Standard C900, "Polyvinyl Chloride (PVC) Pressure Pipe,
4-inch through 12-inch, For Water Distribution". All PVC piping 14-inch through 24-inch shall be DR 18 (pressure class
235 psi) and manufactured in accordance with AWWA Standard C905, "Polyvinyl Chloride (PVC) Water Transmission
Pipe, Nominal Diameters 14-inch through 36". Pipe with a diameter greater than 24 inches shall be specified based on
engineered design.
b. Tracer Wire: All water piping shall be installed with a twelve (12) gauge solid copper wire, plastic coated, six hundred
(600) volt taped to top of pipe and surfaced at each valve as a tracer wire.
c. Pipe Joints: Pipe joints shall be made using an integral bell with an elastomeric gasket push-on type joint or using
machined couplings of a sleeve type with rubber ring gaskets and machined pipe ends to form a push-on type joint.
d. Materials and Installation: All materials installed shall be free of manufacturer defects. Any defective or damaged
materials noted on the construction site shall be so marked and removed from the site. Under no circumstances shall
any PVC piping be installed utilizing mechanical equipment to seat the joints.
e. Pipe Fittings: All fittings shall be mechanical joint, ductile iron, manufactured in accordance with AWWA Standard C153.
Fittings shall be furnished with a cement-mortar lining of standard thickness class with a 250 psi pressure rating.
f. Gate Valves: Gate valves shall conform to AWWA Standard C509 with mechanical joint, 2" open left operating nut and
resilient seat.
g. Butterfly Valves: Butterfly valves shall be used for all valves 12-inches and larger and conform to AWWA Standard C504
with mechanical joint, 2" open left operating nut, resilient seat and shall be equipped with sand bonnet.
h. Fire Hydrants: Hydrants shall conform to AWWA Standard C502, 1" square open-right operating nut. Allowable
manufacturers and models are Mueller Super Centurion with epoxy coated shoe or American Flo Control Waterous
Pacer WB-67-250X with epoxy coated shoe. All fittings shall be swing assemblies with anchor couplings.
i. Pipe, Valve and Fitting Wrap: All fittings, valves, fire hydrant shoes and plugs shall be poly-wrapped with 8-mil thick
polyethylene plastic wrap, double layered, and ends securely taped prior to backfill.
10. Bedding: All pipe shall be bedded in 3/4" washed rock uniformly graded and compacted. Trench shall be excavated to a
depth below established grade equal to 1
4 of pipe diameter (min. 4"). Bell depressions shall be provided for all joints. In event
that unstable trench conditions are encountered at pipeline grade 1-1/2" uniformly graded washed rock shall be used for
stabilization. Bedding material shall be placed and compacted under and around sides of the pipe. Minimum 30" backfill
above pipe before other than hand compaction equipment is to be used. Note maximum trench width detail.
11. Backfill: Backfill of acceptable material shall be placed in lifts not greater than one (1) foot. Backfill shall be compacted
to 95% of optimum density in roadway areas or per road authority’s requirements, and 90% in all other
locations. Compaction testing of bedding and backfill shall be at least five tests per 1,000 feet and at varying depths and
locations in accordance with the requirements of the applicable authority.
12. Joint Restraint: All fittings, tees, plugs and fire hydrants shall be provided with anchor couplings and/or joint restraint in
accordance with District Specifications or as required per engineer’s design. Thrust blocks shall be used only as required
per field conditions and as approved or directed by the District field inspector.
13. Concrete: All concrete construction, including thrust blocks, shall be completed utilizing Type 5 or equal cement only.
14. Asphalt Replacement: For asphalt pavement that is cut and has been in place less than two years (according to City or
County Engineer's record), the cut shall be a minimum of 20 feet in width and will be replaced to the specified depth by a
paving machine.
15. Pipe Cover: A minimum cover of 4-1/2 feet of cover over top of pipe shall be maintained throughout the waterline and
service line installation, particularly in areas of new grading and drainage swales. Extra bury depth may be required to
maintain minimum cover at drainage culvert crossings and/or fire hydrant runs. Maximum allowable cover shall be 6 feet,
unless specifically approved by the District.
16. Connection to Existing System: All connections to existing waterlines shall be completed at developer's expense by District
personnel or the District's authorized contractor with no exception.
17. Inspection: The District shall have the authority to inspect and verify that all construction of facilities is equal to or better than
minimum construction requirements as set forth in the District’s Specifications. The District shall also have the authority to
assign an inspector to check any and all work, including all materials to be incorporated in the work, excavation, bedding,
backfill, testing and all construction methods and practices.
18. Testing and Acceptance: All lines shall be pressure tested, chlorinated and flushed by the Contractor in accordance with
District Specifications and under the District's supervision. Upon passing chlorination testing, bacteriological testing will be
completed by a State certified water quality control laboratory. Copies of all passing test results, including soils compaction
in the area of water main construction, shall be provided to the District.
19. Project As-Built and Record Drawing Requirements:
a. As-built drawings are prepared by the contractor. They confirm, in red ink, on-site changes to the original construction
documents. The As-built drawings shall be delivered to the project’s design engineer for conversion to Record
Drawings. A PDF version shall be delivered to the District.
b. Record Drawings are prepared by the project’s design engineer and reflect on-site changes the contractor noted in the
As-built drawings. The Record Drawings shall be approved by the District prior to Preliminary Acceptance of the project.
Record Drawings are to be delivered to the District in hard copy (11 x 17 format) and electronic format. Hard copy
drawing text font size shall be large enough to be legible with font size approved by the District. Electronic format shall be
delivered in Adobe (PDF), AutoCAD and ArcView shape files (release version to be confirmed with District at time of
submittal). These documents shall accurately reflect any change made in the field which varies from the approved
construction plan and including, at a minimum, field dimensions and elevations, horizontal and vertical locations of
underground utilities and appurtenances. Include with the Record Drawings a complete copy of the recorded Filing Plat
and a written confirmation of total costs of all water system improvements involved.
20. Warranty: The Contractor shall warrant all work associated with the waterline installation including, but not limited to the
materials, installation workmanship and surface restoration for a period of two years from date of Preliminary Acceptance.
During this warranty period the Contractor shall repair any defects in the work and maintain the work area. At the close of
the two-year warranty period and upon satisfactory correction of any deficiencies noted, the District shall accept the
constructed lines and appurtenances as the sole property and responsibility of the District.
maintained in good repair by the Developer, until such time as the entire disturbed areas is stabilized with hard surface or landscaping.
21. The Developer shall be responsible for insuring that no mud or debris shall be tracked onto the existing public street system. Mud and debris must be
removed within 24 hours by an appropriate mechanical method (i.e. machine broom sweep, light duty front-end loader, etc.) or as approved by the the
City of Fort Collins street inspector.
22. No work may commence within any improved or unimproved public Right-of-Way until a Right-of-Way Permit or Development Construction Permit is
obtained, if applicable.
23. The Developer shall be responsible for obtaining all necessary permits for all applicable agencies prior to commencement of construction. The
Developer shall notify the the City of Fort Collins Inspector (Fort Collins - 221-6605) and the City of Fort Collins Erosion Control Inspector (Fort Collins
- 221-6700) at least 2 working days prior to the start of any earth disturbing activity, or construction on any and all public improvements. If the City of
Fort Collins Engineer is not available after proper notice of construction activity has been provided, the Developer may commence work in the
Engineer's absence. However, the City of Fort Collins reserves the right not to accept the improvement if subsequent testing reveals an improper
installation.
24. The Developer shall be responsible for obtaining soils tests within the Public Right-of-Way after right of way grading and all utility trench work is
complete and prior to the placement of curb, gutter, sidewalk and pavement. If the final soils/pavement design report does not correspond with the
results of the original geotechnical report, the Developer shall be responsible for a re-design of the subject pavement section or, the Developer may
use the City of Fort Collins' default pavement thickness section(s). Regardless of the option used, all final soils/pavement design reports shall be
prepared by a licensed Professional Engineer. The final report shall be submitted to the Inspector a minimum of 10 working days prior to placement of
base and asphalt. Placement of curb, gutter, sidewalk, base and asphalt shall not occur until the City of Fort Collins Engineer approves the final report.
25. The contractor shall hire a licensed engineer or land surveyor to survey the constructed elevations of the street subgrade and the gutter flowline at all
intersections, inlets, and other locations requested by the the City of Fort Collins inspector. The engineer or surveyor must certify in a letter to the City
of Fort Collins that these elevations conform to the approved plans and specifications. Any deviations shall be noted in the letter and then resolved with
the City of Fort Collins before installation of base course or asphalt will be allowed on the streets.
26. All utility installations within or across the roadbed of new residential roads must be completed prior to the final stages of road construction. For the
purposes of these standards, any work except c/g above the subgrade is considered final stage work. All service lines must be stubbed to the property
lines and marked so as to reduce the excavation necessary for building connections.
27. Portions of Larimer County are within overlay districts. The Larimer County Flood Plain Resolution should be referred to for additional criteria for roads
within these districts.
28. All road construction in areas designated as Wild Fire Hazard Areas shall be done in accordance with the construction criteria as established in the
Wild Fire Hazard Area Mitigation Regulations in force at the time of final plat approval.
29. Prior to the commencement of any construction, the contractor shall contact the Local Entity Forester to schedule a site inspection for any tree removal
requiring a permit.
30. The Developer shall be responsible for all aspects of safety including, but not limited to, excavation, trenching, shoring, traffic control, and security.
Refer to OSHA Publication 2226, Excavating and Trenching.
31. The Developer shall submit a Construction Traffic Control Plan, in accordance with MUTCD, to the appropriate Right-of-Way authority. (The the City of
Fort Collins, Larimer County, Colorado), for approval, prior to any construction activities within, or affecting, the Right-of-Way. The Developer shall be
responsible for providing any and all traffic control devices as may be required by the construction activities.
32. Prior to the commencement of any construction that will affect traffic signs of any type, the contractor shall contact the City of Fort Collins Traffic
Operations Department, who will temporarily remove or relocate the sign at no cost to the contractor, however, if the contractor moves the traffic sign
then the contractor will be charged for the labor, materials and equipment to reinstall the sign as needed.
33. The Developer is responsible for all costs for the initial installation of traffic signing and striping for the Development related to the Development's local
street operations. In addition, the Developer is responsible for all costs for traffic signing and striping related to directing traffic access to and from the
Development.
34. There shall be no site construction activities on Saturdays, unless specifically approved by the City of Fort Collins Engineer, and no site construction
activities on Sundays or holidays, unless there is prior written approval by Larimer County.
35. The Developer is responsible for providing all labor and materials necessary for the completion of the intended improvements, shown on these
drawings, or designated to be provided, installed, or constructed, unless specifically noted otherwise.
36. Dimensions for layout and construction are not to be scaled from any drawing. If pertinent dimensions are not shown, contact the Designer for
clarification, and annotate the dimension on the as-built record drawings.
37. The Developer shall have, onsite at all times, one (1) signed copy of the approved plans, one (1) copy of the appropriate standards and specifications,
and a copy of any permits and extension agreements needed for the job.
38. If, during the construction process, conditions are encountered which could indicate a situation that is not identified in the plans or specifications, the
Developer shall contact the Designer and the City of Fort Collins Engineer immediately.
39. The Developer shall be responsible for recording as-built information on a set of record drawings kept on the construction site, and available to the
Larimer County's Inspector at all times. Upon completion of the work, the contractor(s) shall submit record drawings to the City of Fort Collins Engineer.
40. The Designer shall provide, in this location on the plan, the location and description of the nearest survey benchmarks (2) for the project as well as the
basis of bearings. The information shall be as follows:
PROJECT DATUM: NAVD88
City of Fort Collins benchmark 29-01
Located on the South side of Prospect Road, East of the intersection of the West frontage road of I-25 and Prospect Road, East of the Colorado
Welcome Center, on a concrete headwall to an irrigation pipe.
Elevation=4904.41
City of Fort Collins benchmark 47-01
South side of Prospect Road where it intersects I-25, on the West end of the parapet wall to the bridge (B 16 AM) over I-25 , on a Dept of Highways
brass cap.
Elevation=4934.13
Please note: This plan set is using NAVD88 for a vertical datum. Surrounding developments have used NGVD29 unadjusted (prior City of Fort
Collins datum) for their vertical datums.
If NGVD29 unadjusted datum (prior City of Fort Collins datum) is required for any purpose, the following equation should be used:
NGVD29 (prior City of Fort Collins datum) = NAVD88 - 3.19'
Basis of Bearings
Basis of Bearings is the North line of the Northeast Quarter of Section 21, Township 7 North, Range 68 West of the 6th P.M. as bearing North 88° 21'
24" West (assumed bearing).
41. All stationing is based on centerline of roadways unless otherwise noted.
42. Damaged curb, gutter and sidewalk existing prior to construction, as well as existing fences, trees, streets, sidewalks, curbs and gutters, landscaping,
structures, and improvements destroyed, damaged or removed due to construction of this project, shall be replaced or restored in like kind at the
Developer's expense, unless otherwise indicated on these plans, prior to the acceptance of completed improvements and/or prior to the issuance of
the first Certificate of Occupancy.
43. When an existing asphalt street must be cut, the street must be restored to a condition equal to or better than its original condition. The existing street
condition shall be documented by the City of Fort Collins Construction Inspector before any cuts are made. Patching shall be done in accordance with
the City of Fort Collins Street Repair Standards. The finished patch shall blend in smoothly into the existing surface. All large patches shall be paved
with an asphalt lay-down machine. In streets where more than one cut is made, an overlay of the entire street width, including the patched area, may
be required. The determination of need for a complete overlay shall be made by the Larimer County Engineer and/or the City of Fort Collins Inspector
at the time the cuts are made.
44. Upon completion of construction, the site shall be cleaned and restored to a condition equal to, or better than, that which existed before construction,
or to the grades and condition as required by these plans.
45. Standard Handicap ramps are to be constructed at all curb returns and at all "T" intersections.
46. After acceptance by the City of Fort Collins, public improvements depicted in these plans shall be guaranteed to be free from material and
workmanship defects for a minimum period of two years from the date of acceptance.
47. The City of Fort Collins shall not be responsible for the maintenance of roadway and appurtenant improvements, including storm drainage structures
and pipes, for the following private streets: N.A.
48. Approved Variances are listed as follows: N.A.
CONSTRUCTION NOTES
A. Grading and Erosion Control Notes
1. The erosion control inspector must be notified at least twenty-four (24) hours prior to any construction on this site.
2. There shall be no earth-disturbing activity outside the limits designated on the accepted plans.
3. All required perimeter silt and construction fencing shall be installed prior to any land disturbing activity (stockpiling, stripping, grading, etc). All other
required erosion control measures shall be installed at the appropriate time in the construction sequence as indicated in the approved project schedule,
construction plans, and erosion control report.
4. At all times during construction, the Developer shall be responsible for preventing and controlling on-site erosion including keeping the property
sufficiently watered so as to minimize wind blown sediment. The Developer shall also be responsible for installing and maintaining all erosion control
facilities shown herein.
5. Pre-disturbance vegetation shall be protected and retained wherever possible. Removal or disturbance of existing vegetation shall be limited to the
area(s) required for immediate construction operations, and for the shortest practical period of time.
6. All soils exposed during land disturbing activity (stripping, grading, utility installations, stockpiling, filling, etc.) shall be kept in a roughened condition by
ripping or disking along land contours until mulch, vegetation, or other permanent erosion control BMPs are installed. No soils in areas outside project
street rights-of-way shall remain exposed by land disturbing activity for more than thirty (30) days before required temporary or permanent erosion
control (e.g. seed/mulch, landscaping, etc.) is installed, unless otherwise approved by the City/County.
7. In order to minimize erosion potential, all temporary (structural) erosion control measures shall:
a. Be inspected at a minimum of once every two (2) weeks and after each significant storm event and repaired or reconstructed as necessary in order
to ensure the continued performance of their intended function.
b. Remain in place until such time as all the surrounding disturbed areas are sufficiently stabilized as determined by the erosion control inspector.
c. Be removed after the site has been sufficiently stabilized as determined by the erosion control inspector.
8. When temporary erosion control measures are removed, the Developer shall be responsible for the clean up and removal of all sediment and debris
from all drainage infrastructure and other public facilities.
9. The contractor shall immediately clean up any construction materials inadvertently deposited on existing streets, sidewalks, or other public rights of
way, and make sure streets and walkways are cleaned at the end of each working day.
10. All retained sediments, particularly those on paved roadway surfaces, shall be removed and disposed of in a manner and location so as not to cause
their release into any waters of the United States.
11. No soil stockpile shall exceed ten (10) feet in height. All soil stockpiles shall be protected from sediment transport by surface roughening, watering,
and perimeter silt fencing. Any soil stockpile remaining after thirty (30) days shall be seeded and mulched.
12. The stormwater volume capacity of detention ponds will be restored and storm sewer lines will be cleaned upon completion of the project and before
turning the maintenance over to the City/County or Homeowners Association (HOA).
13. City Ordinance and Colorado Discharge Permit System (CDPS) requirements make it unlawful to discharge or allow the discharge of any pollutant or
contaminated water from construction sites. Pollutants include, but are not limited to discarded building materials, concrete truck washout, chemicals,
oil and gas products, litter, and sanitary waste. The developer shall at all times take whatever measures are necessary to assure the proper
containment and disposal of pollutants on the site in accordance with any and all applicable local, state, and federal regulations.
14. A designated area shall be provided on site for concrete truck chute washout. The area shall be constructed so as to contain washout material and
located at least fifty (50) feet away from any waterway during construction. Upon completion of construction activities the concrete washout material
will be removed and properly disposed of prior to the area being restored.
15. Conditions in the field may warrant erosion control measures in addition to what is shown on these plans. The Developer shall implement whatever
measures are determined necessary, as directed by the City.
16. See separate SWMP - N/A for additional information.
B. Street Improvement Notes
1. All street construction is subject to the General Notes on the cover sheet of these plans as well as the Street Improvements Notes listed here.
2. A paving section design, signed and stamped by a Colorado licensed Engineer, must be submitted to the City of Fort Collins Engineer for approval,
prior to any street construction activity, (full depth asphalt sections are not permitted at a depth greater than 8 inches of asphalt). The job mix shall be
submitted for approval prior to placement of any asphalt.
3. Where proposed paving adjoins existing asphalt, the existing asphalt shall be saw cut, a minimum distance of 12 inches from the existing edge, to
create a clean construction joint. The Developer shall be required to remove existing pavement to a distance where a clean construction joint can be
made. Wheel cuts shall not be allowed unless approved by the City of Fort Collins Engineer in Fort Collins.
4. Street subgrades shall be scarified the top 12 inches and re-compacted prior to subbase installation. No base material shall be laid until the subgrade
has been inspected and approved by the City of Fort Collins Engineer.
5. Ft. Collins only. Valve boxes and manholes are to be brought up to grade at the time of pavement placement or overlay. Valve box adjusting rings are
not allowed.
6. When an existing asphalt street must be cut, the street must be restored to a condition equal to or better than its original condition. The existing street
condition shall be documented by the Inspector before any cuts are made. Cutting and patching shall be done in conformance with Chapter 25,
Reconstruction and Repair. The finished patch shall blend smoothly into the existing surface. The determination of need for a complete overlay shall be
made by the City of Fort Collins Engineer. All overlay work shall be coordinated with adjacent landowners such that future projects do not cut the new
asphalt overlay work.
7. All traffic control devices shall be in conformance with these plans or as otherwise specified in M.U.T.C.D. (including Colorado supplement) and as per
the Right-of-Way Work Permit traffic control plan.
8. The Developer is required to perform a gutter water flow test in the presence of the City of Fort Collins Inspector and prior to installation of asphalt.
Gutters that hold more than 1/4 inch deep or 5 feet longitudinally, of water, shall be completely removed and reconstructed to drain properly.
9. Prior to placement of H.B.P. or concrete within the street and after moisture/density tests have been taken on the subgrade material (when a full depth
section is proposed) or on the subgrade and base material (when a composite section is proposed), a mechanical "proof roll" will be required. The
entire subgrade and/or base material shall be rolled with a heavily loaded vehicle having a total GVW of not less than 50,000 lbs. and a single axle
weight of at least 18,000 lbs. with pneumatic tires inflated to not less that 90 p.s.i.g. "Proof roll" vehicles shall not travel at speeds greater than 3 m.p.h.
Any portion of the subgrade or base material which exhibits excessive pumping or deformation, as determined by the City of Fort Collins Engineer,
shall be reworked, replaced or otherwise modified to form a smooth, non-yielding surface. The City of Fort Collins Engineer shall be notified at least 24
hours prior to the "proof roll." All "proof rolls" shall be preformed in the presence of an Inspector.
C. Traffic Signing and Pavement Marking Construction Notes
1. All signage and marking is subject to the General Notes on the cover sheet of these plans, as well as the Traffic Signing and Marking Construction
Notes listed here.
2. All symbols, including arrows, ONLYS, crosswalks, stop bars, etc. shall be pre-formed thermo-plastic.
3. All signage shall be per the City of Fort Collins Standards and these plans or as otherwise specified in MUTCD.
4. All lane lines for asphalt pavement shall receive two coats of latex paint with glass beads.
5. All lane lines for concrete pavement should be epoxy paint.
6. Prior to permanent installation of traffic striping and symbols, the Developer shall place temporary tabs or tape depicting alignment and placement of
the same. Their placement shall be approved by the City of Fort Collins Traffic Engineer prior to permanent installation of striping and symbols.
7. Pre-formed thermo-plastic applications shall be as specified in these Plans and/or these Standards.
8. Epoxy applications shall be applied as specified in CDOT Standard Specifications for Road and Bridge Construction.
9. All surfaces shall be thoroughly cleaned prior to installation of striping or markings.
10. All sign posts shall utilize break-away assemblies and fasteners per the Standards.
11. A field inspection of location and installation of all signs shall be performed by the City of Fort Collins Traffic Engineer. All discrepancies identified
during the field inspection must be corrected before the 2-year warranty period will begin.
12. The Developer installing signs shall be responsible for locating and protecting all underground utilities.
13. Special care shall be taken in sign location to ensure an unobstructed view of each sign.
14. Signage and striping has been determined by information available at the time of review. Prior to initiation of the warranty period,the City of Fort Collins
Traffic Engineer reserves the right to require additional signage and/or striping if the City of Fort Collins Traffic Engineer determines that an unforeseen
condition warrants such signage according to the MUTCD or the CDOT M and S Standards. All signage and striping shall fall under the requirements
of the 2-year warranty period for new construction (except fair wear on traffic markings).
15. Sleeves for sign posts shall be required for use in islands/medians. Refer to Chapter 14, Traffic Control Devices, for additional detail.
D. Storm Drainage Notes
1. The City of Fort Collins shall not be responsible for the maintenance of storm drainage facilities located on private property. Maintenance of onsite
drainage facilities shall be the responsibility of the property owner(s).
2. All recommendations of the Drainage Report by Northern Engineering, dated December 24, 2018, shall be followed and implemented.
3. Prior to final inspection and acceptance by the City of Fort Collins, certification of the drainage facilities, by a registered engineer, must by submitted to
and approved by the Stormwater Utility Department. Certification shall be submitted to the Stormwater Utility Department at least two weeks prior to
the release of a certificate of occupancy for single family units. For commercial properties, certification shall by submitted to the Stormwater Utility
Department at least two weeks prior to the release of any building permits in excess of those allowed prior to certification per the Development
Agreement.
C0.01
GENERAL & CONSTRUCTION NOTES
2
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
UTILITY PLAN APPROVAL
BOXELDER SANITATION DISTRICT
EAST LARIMER COUNTY WATER DISTRICT
UTILITY PLAN REVIEW
NGVD29 (prior City of Fort Collins datum) = NAVD88 - 3.19'
Basis of Bearings
Basis of Bearings is the North line of the Northeast Quarter of Section 21, Township 7 North,
Range 68 West of the 6th P.M. as bearing North 88° 21' 24" West (assumed bearing).
Northern Engineering Services, Inc
NE Project No. 232-043
Date: March 03, 2013
ORIGINAL FIELD SURVEY BY:
SUBSURFACE EXPLORATION BY:
PROJECT BENCHMARKS:
SHEET INDEX
C0.00 COVER SHEET
C0.01 GENERAL & CONSTRUCTION NOTES
C0.02 ELCO & BOXELDER GENERAL NOTES
& TYPICAL ROADWAY SECTIONS
C1.00-C1.02 EXISTING CONDITIONS &
DEMOLITION PLAN
C2.00 OVERALL UTILITY PLAN
C2.01-C2.02 12" WATER LINE PLAN & PROFILE
C2.03-C2.08 FUTURE 12" WATER LINE PLAN & PROFILE
C2.10 SANITARY LINES A & A2 PLAN & PROFILE
C2.11-C2.12 FUTURE SANITARY LINE A PLAN & PROFILE
C2.13-C2.14 FUTURE SANITARY LINE A2 PLAN & PROFILE
C2.15-C2.17 FUTURE SANITARY LINE B PLAN & PROFILE
C2.20 CULVERTS 1, 2, & 3 PLAN & PROFILE
C3.00 OVERALL GRADING PLAN
C4.00-C4.02 SW FRONTAGE ROAD-INTERIM
PLAN & PROFILE
C5.00-C5.01 UTILITY DETAILS
C5.02 DRAINAGE DETAILS
C5.03 SITE DETAILS
C6.00 EROSION CONTROL PLAN
C6.01 EROSION CONTROL DETAILS
PUBLIC IMPROVEMENT CONSTRUCTION PLANS FOR
BEING PART OF SECTION 21 AND SECTION 22, TOWNSHIP 7 NORTH, RANGE 68 WEST OF THE 6TH P.M.,
CITY OF FORT COLLINS, COUNTY OF LARIMER, STATE OF COLORADO
SW PROSPECT & I-25
Colorado State University
Research Foundation (CSURF)
Michael 'Bo' Brown
P.O. Box 483
Fort Collins, Colorado 80522
(970) 472-0491
The Birdsall Group
Kristin Turner
444 Mountain Ave.
Berthoud, Colorado 80513
(970) 532-5891
Colorado State University
Research Foundation (CSURF)
Michael 'Bo' Brown
P.O. Box 483
Fort Collins, Colorado 80522
(970) 472-0491
Earth Engineering Company, Inc.
David A. Richer, PE
4396 Greenfield Drive
Windsor, Colorado 80550
(970) 545-3908
GEOTECHNICAL ENGINEER
Matt Delich, PE
Delich Associates
2272 Glen Haven Drive
Loveland, Colorado 80538
(970) 669-2061
TRAFFIC ENGINEER
Blue Mountain Environmental Consulting, LLC
Matt Tobler, Natural Resource Specialist
937 Mallard Drive
Fort Collins, Colorado 80521
(970) 224-0851
ENVIRONMENTAL ENGINEER
ENGINEER ING
N O R T H E RN
ENGINEER ING
N O R T H E RN
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C0.00
COVER SHEET
1
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
UTILITY PLAN APPROVAL
BOXELDER SANITATION DISTRICT
EAST LARIMER COUNTY WATER DISTRICT
UTILITY PLAN REVIEW
Earth Engineering, Inc.
"Preliminary Subsurface Exploration Report CSURF 25-Acre
Parcel Southwest of East Prospect Road and 1-25"
Fort Collins, Colorado
EEC Project no. 1072151
Date: November 9, 2007
NO MATERIALS INCLUDING 2x4'S, PIPES,
DIRT, GRAVEL OR ASPHALT, SHALL BE
PLACED IN GUTTER TO FACILITATE
MOUNTING CURB; HOWEVER, CURB MAY BE
CUT DOWN TO A HEIGHT OF 2" OR HIGHER
FOR EASIER ACCESS AND REPLACED AT
PROJECT COMPLETION. OTHER ACCESS
DEVICES MAY BE USED AS ACCEPTED BY
THE CITY.
CURB CUT
50' MIN.
2" MIN. 6" MIN.
6" MIN.
ALTHOUGH NOT NORMALLY USED, THE CITY RESERVES THE RIGHT TO REQUIRE VEHICLE TRACKING CONTROL WITH A TEMPORARY CATTLE GUARD
AND/OR WHEEL WASH FACILITIES AT SITES WHERE TRACKING ONTO PAVED AREAS BECOMES A SIGNIFICANT PROBLEM AS DETERMINED BY THE CITY
INSPECTOR.
IF VEHICLE TRACKING CONTROL WITH WHEEL WASH FACILITIES ARE REQUIRED, ALL WHEELS ON EVERY VEHICLE LEAVING THE SITE SHALL BE
CLEANED OF MUD USING A PRESSURE-WASHER. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING A WATER SOURCE AND CONSTRUCTING
A WASHWATER SEDIMENT TRAP.
5.
6.
IF VEHICLE WHEEL WASH FACILITIES ARE REQUIRED, CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL AND WHEEL WASH FACILITIES DAILY.
ACCUMULATED SEDIMENTS SHALL BE REMOVED FROM THE PAD SURFACE.
ACCUMULATED SEDIMENT IN THE WASHWATER/SEDIMENT TRAP SHALL BE REMOVED WHEN THE SEDIMENT REACHES AN AVERAGE DEPTH OF 12-INCHES.
4.
5.
VTC
CONCRETE WASHOUT AREA
VEHICLE TRACKING CONTROL PAD SILT FENCE/PERIMETER PROTECTION
POSTS
PREASSEMBLED SILT FENCE POSTS SHALL OVERLAP
AT JOINTS SO THAT NO
GAPS EXIST IN SILT FENCE.
NOTE:
THICKNESS OF GEOTEXTILE
POST SHALL BE JOINED AS SHOWN, THEN HAS BEEN EXAGGERATED.
ROTATED 180° IN DIRECTION SHOWN AND
DRIVEN INTO THE GROUND.
SILT FENCE JOINTS
DRIVE POSTS VERTICALLY INTO THE GROUND TO A MINIMUM DEPTH OF 18".
EXCAVATE A TRENCH APPROXIMATELY 4" WIDE AND 4" DEEP ALONG THE
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
ANCHOR TRENCH SHALL BE EXCAVATED BY HAND, WITH TRENCHER, OR
WITH SILT FENCE INSTALLATION MACHINE. NO ROAD GRADERS, BACKHOES,
ETC. SHALL BE USED.
NOT LESS THAN THE BOTTOM 1' OF THE SILT FENCE FABRIC SHALL BE
BURIED IN THE TRENCH.
THE TRENCH SHALL BE COMPACTED BY HAND, WITH "JUMPING JACK" OR BY
WHEEL ROLLING. COMPACTION SHALL BE SUCH THAT THE SILT FENCE
RESISTS BEING PULLED OUT OF ANCHOR TRENCH BY HAND.
SILT FENCE INDICATED IN THE PLANS SHALL BE INSTALLED PRIOR TO ANY
LAND-DISTURBING ACTIVITIES.
USE WOOD POSTS OR OTHER MATERIAL AS ACCEPTED BY THE CITY.
INSTALLATION NOTES:
1.
2.
3.
4.
5.
6.
7.
THE CONTRACTOR SHALL INSPECT SILT FENCE EVERY TWO WEEKS AND
AFTER SIGNIFICANT STORM EVENTS AND MAKE REPAIRS OR CLEAN OUT
UPSTREAM SEDIMENT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF SILT FENCE SHALL BE REMOVED
WHEN THE UPSTREAM SEDIMENT REACHES A DEPTH OF 6".
SILT FENCE SHALL BE REMOVED WHEN THE UPSTREAM DISTURBED AREA IS
STABILIZED AND GRASS COVER IS ACCEPTED BY THE CITY. IF ANY
DISTURBED AREA EXISTS AFTER REMOVAL, IT SHALL BE SEEDED AND
MULCHED OR OTHERWISE STABILIZED IN A MANNER ACCEPTED BY THE CITY.
MAINTENANCE NOTES:
1.
2.
3.
4" MIN.
4" MIN.
1
1
2" x 1
1
2" WOODEN FENCE POSTS
SF SF
SWALE WATTEL DIKE
SOIL RIPRAP INSTALLATION
NOTES
1. CONCRETE WASHOUT AREA SHALL BE
INSTALLED PRIOR TO ANY CONCRETE
PLACEMENT ON SITE.
2. VEHICLE TRACKING CONTROL IS REQUIRED IF
ACCESS TO CONCRETE WASHOUT AREA IS OFF
PAVEMENT.
3. SIGNS SHALL BE PLACED AT THE
CONSTRUCTION ENTRANCE, AT THE WASHOUT
AREA, AND ELSEWHERE AS NECESSARY TO
CLEARLY INDICATE THE LOCATION OF THE
CONCRETE WASHOUT AREA TO OPERATORS
OF CONCRETE TRUCKS AND PUMP RIGS.
4. THE CONCRETE WASHOUT AREA SHALL BE
REPAIRED AND ENLARGED OR CLEANED OUT
AS NECESSARY TO MAINTAIN CAPACITY FOR
WASTED CONCRETE.
5. THE CONCRETE WASHOUT SHOULD BE
EMPTIED WHEN HALF OF TOTAL HOLDING
CAPACITY HAS BEEN REACHED.
6. AT THE END OF CONSTRUCTION, ALL
CONCRETE SHALL BE REMOVED FROM THE
SITE AND DISPOSED OF AT AN ACCEPTED
WASTE SITE.
7. WHEN THE CONCRETE WASHOUT AREA IS
REMOVED, THE DISTURBED AREA SHALL BE
SEEDED AND MULCHED OR OTHERWISE
STABILIZED IN A MANNER ACCEPTED BY THE
CITY.
8. LOCATION OF CONCRETE WASHOUT AREA IS
CONCEPTUAL ONLY. FINAL LOCATION TO BE
DETERMINED IN THE FIELD AT CONTRACTOR'S
DISCRETION.
3H:1V OR FLATTER
SIDE SLOPES
12" MIN
8'x 8' MIN
OR AS REQUIRED TO
CONTAIN WASTE CONCRETE
12" 2'-0" MIN.
COMPACTED EMBANKMENT
MATERIAL, TYP.
BERM AROUND PERIMETER
GROUND SURFACE
SIGN TO INDICATE THE
LOCATION OF THE
CONCRETE WASHOUT AREA
*IMPERMEABLE LINER MAY BE NEEDED
IF GROUND WATER IS ENCOUNTERED.
RP
005
002
001
003 004
/ / / / / / / /
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/ / / / / / / /
/ / / / / / / /
F
E
S
VAULT
ELEC
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/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
SW FRONTAGE ROAD
INTERSTATE 25
PROPOSED
CULVERT
PROPOSED
CULVERT
PROPOSED
CULVERT
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF SF
SF
SF
SF
C
ALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
NORTH
( IN FEET )
1 inch = ft.
80 0 80 Feet
80
160 240
KEYMAP
F SE
M
VAULT
ELEC
INTERSTATE 25
PROSPECT ROAD
MCLAUGHLIN LN
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
SWMP
DYNAMIC EROSION CONTROL PLANS
N/A
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
1. IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES
ONLY AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR
PHASING OF BEST MANAGEMENT PRACTICES (BMPs) IS EXPECTED.
ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY
DEPICTED MAY BE NECESSARY DURING CONSTRUCTION DUE TO
CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2. THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH,
GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY
NECESSARILY SHOWN IN THEIR EXACT LOCATION.
3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING
(CITY, STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH
GOVERNING AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF
THE CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION
CONTROL MEASURES ARE PROPERLY MAINTAINED AND FOLLOWED.
4. CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION
CONTROL MEASURES ACCORDING THE THE CONSTRUCTION
SEQUENCING AND LEVEL OF SITE STABILIZATION.
5. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL
SITE IS FULLY STABILIZED.
6. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM,
UNTIL CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7. INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE
SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN
WATTLES FOR BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR
PAVEMENT, ETC.)
8. CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES,
PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING,
HYDRO MULCHING, EROSION MATS, TEMPORARY IRRIGATION, AND
ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO
ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
9. ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE
NECESSARY TO INSURE THAT EACH BUILDING PAD IS STABILIZED
THROUGHOUT CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE
ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
10. CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER
PROTECTION FOR AREAS DIRECTING DRAINAGE OFFSITE.
PERIMETER PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO
THE SURROUNDING SURFACE TYPE AND CONDITION (i.e.,
STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE
SOIL, SAND BAGS OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
11. FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED
(100) FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL
DRAINAGE WAY OR MANMADE DRAINAGE WAY. THE FUEL TANKS
AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT
WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW, SEEP, RUN OFF,
OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
12. CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE
SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT
LEAST FIFTY (50) FEET FROM ANY STORMWATER INLET, WETLAND,
OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF
WATER, WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE
LOCATED ON FLAT, STABLE GROUND, AND CONSTRUCTION TOILETS
SHALL BE STAKED DOWN.
13. THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE
WITH THE CITY'S CONSTRUCTION INSPECTORS BY CEASING
OPERATIONS WHEN WINDS ARE OF SUFFICIENT VELOCITY TO
CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS
HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
14. WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND
WINTER MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS,
DISTURBED AREAS WILL BE TREATED WITH MULCH AND MULCH
TACKIFIER OR OTHER MATERIALS APPROVED BY EROSION CONTROL
STAFF TO PREVENT EROSION.
15. SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON
PLANTING, REVEGETATION, HARDSCAPE AND OTHER PERMANENT
SITE STABILIZATION METHODS.
TABLE OF CONSTRUCTION SEQUENCE AND BMP EROSION CONTROL NOTES:
APPLICATION
CONSTRUCTION PHASE
(DESCRIPTION)
PHASE I
(GRADING)
PHASE II
(INFRASTRUCTURE)
PHASE III
(VERTICAL
CONSTRUCITON)
PHASE IV
(PERMANENT
BMP'S)
Grading (Include Offsite)
Overlot
Pipeline Installation
Stormwater
Concrete Installation
Site Walls
Building Structure
Miscellaneous
Hardscape Amenities
BEST MANAGEMENT PRACTICES
Temporary
Inlet Protection (IP)
Vehicle Tracking Control (VTC)
Flow Barriers (Wattles, Rock Socks, etc.) (RS)
Concrete Washout Area (CWA)
Preventative Maintenance Activities/Meetings/etc.
Silt Fence (SF)
Permanent
Mulching/Sealant
Permanent Seed Planting
Sewer Service
Water Service
Curb and Gutter
Rip Rap (RP)
Erosion Control Fabric (EF)
C6.00
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPERTY BOUNDARY
BENCHMARK/BASIS OF BEARING:
SILT FENCE SF SF
RIPRAP w/ TURF REINFORCEMENT MAT RP
1. CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2. SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3. CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4. REFER TO THE DRAINAGE REPORT - N/A BY NORTHERN ENGINEERING FOR
ADDITIONAL INFORMATION.
GENERAL NOTES:
WATTLE DIKE WD
CONCRETE WASH AREA CWA
VERTICAL TRACKING CONTROL VTC
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 29-01
LOCATED ON THE SOUTH SIDE OF PROSPECT ROAD, EAST OF THE
INTERSECTION OF THE WEST FRONTAGE ROAD OF I-25 AND PROSPECT ROAD,
EAST OF THE COLORADO WELCOME CENTER, ON A CONCRETE HEADWALL TO
AN IRRIGATION PIPE.
ELEVATION=4904.41
CITY OF FORT COLLINS BENCHMARK 47-01
SOUTH SIDE OF PROSPECT ROAD WHERE IT INTERSECTS I-25, ON THE WEST
END OF THE PARAPET WALL TO THE BRIDGE (B 16 AM) OVER I-25 , ON A DEPT
OF HIGHWAYS BRASS CAP.
ELEVATION=4934.13
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM.
SURROUNDING DEVELOPMENTS HAVE USED NGVD29 UNADJUSTED (PRIOR
CITY OF FORT COLLINS DATUM) FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS
REQUIRED FOR ANY PURPOSE, THE FOLLOWING EQUATION SHOULD BE USED:
NGVD29 (PRIOR CITY OF FORT COLLINS DATUM) = NAVD88 - 3.19'
BASIS OF BEARINGS
BASIS OF BEARINGS IS THE NORTH LINE OF THE NORTHEAST QUARTER OF
SECTION 21, TOWNSHIP 7 NORTH, RANGE 68 WEST OF THE 6TH P.M. AS
BEARING NORTH 88° 21' 24" WEST (ASSUMED BEARING).
/ / / / / / / /
/ / / / / / / /
/ / / / / / / / / / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
F
E
S
VAULT
ELEC
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
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/ / / / / / / /
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/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
/ / / / / / / /
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/ / / / / / / /
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/ / / / / / / /
/ / / / / / / /
SW FRONTAGE ROAD
INTERSTATE 25
PROPOSED
CULVERT
PROPOSED
CULVERT
PROPOSED
CULVERT
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF
SF SF
SF
SF
SF
C
ALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
NORTH
( IN FEET )
1 inch = ft.
80 0 80 Feet
80
160 240
KEYMAP
F SE
M
VAULT
ELEC
INTERSTATE 25
PROSPECT ROAD
MCLAUGHLIN LN
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
Call before you dig.
R
C6.00
EROSION CONTROL PLANS
33
Sheet
SW PROSPECT & I-25 These drawings are
instruments of service
provided by Northern
Engineering Services, Inc.
and are not to be used for
any type of construction
unless signed and sealed by
a Professional Engineer in
the employ of Northern
Engineering Services, Inc.
NOT FOR CONSTRUCTION
REVIEW SET
E NGINEER ING
N O R T H E RN
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.com
of 34
1. IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES
ONLY AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR
PHASING OF BEST MANAGEMENT PRACTICES (BMPs) IS EXPECTED.
ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY
DEPICTED MAY BE NECESSARY DURING CONSTRUCTION DUE TO
CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2. THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH,
GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY
NECESSARILY SHOWN IN THEIR EXACT LOCATION.
3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING
(CITY, STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH
GOVERNING AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF
THE CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION
CONTROL MEASURES ARE PROPERLY MAINTAINED AND FOLLOWED.
4. CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION
CONTROL MEASURES ACCORDING THE THE CONSTRUCTION
SEQUENCING AND LEVEL OF SITE STABILIZATION.
5. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL
SITE IS FULLY STABILIZED.
6. CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION
FOR DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM,
UNTIL CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7. INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE
SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN
WATTLES FOR BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR
PAVEMENT, ETC.)
8. CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES,
PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING,
HYDRO MULCHING, EROSION MATS, TEMPORARY IRRIGATION, AND
ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO
ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
9. ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE
NECESSARY TO INSURE THAT EACH BUILDING PAD IS STABILIZED
THROUGHOUT CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE
ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
10. CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER
PROTECTION FOR AREAS DIRECTING DRAINAGE OFFSITE.
PERIMETER PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO
THE SURROUNDING SURFACE TYPE AND CONDITION (i.e.,
STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE
SOIL, SAND BAGS OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
11. FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED
(100) FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL
DRAINAGE WAY OR MANMADE DRAINAGE WAY. THE FUEL TANKS
AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT
WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW, SEEP, RUN OFF,
OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
12. CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE
SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT
LEAST FIFTY (50) FEET FROM ANY STORMWATER INLET, WETLAND,
OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF
WATER, WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE
LOCATED ON FLAT, STABLE GROUND, AND CONSTRUCTION TOILETS
SHALL BE STAKED DOWN.
13. THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE
WITH THE CITY'S CONSTRUCTION INSPECTORS BY CEASING
OPERATIONS WHEN WINDS ARE OF SUFFICIENT VELOCITY TO
CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS
HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
14. WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND
WINTER MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS,
DISTURBED AREAS WILL BE TREATED WITH MULCH AND MULCH
TACKIFIER OR OTHER MATERIALS APPROVED BY EROSION CONTROL
STAFF TO PREVENT EROSION.
15. SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON
PLANTING, REVEGETATION, HARDSCAPE AND OTHER PERMANENT
SITE STABILIZATION METHODS.
TABLE OF CONSTRUCTION SEQUENCE AND BMP EROSION CONTROL NOTES:
APPLICATION
CONSTRUCTION PHASE
(DESCRIPTION)
PHASE I
(GRADING)
PHASE II
(INFRASTRUCTURE)
PHASE III
(VERTICAL
CONSTRUCITON)
PHASE IV
(PERMANENT
BMP'S)
Grading (Include Offsite)
Overlot
Pipeline Installation
Stormwater
Concrete Installation
Site Walls
Building Structure
Miscellaneous
Hardscape Amenities
BEST MANAGEMENT PRACTICES
Temporary
Inlet Protection (IP)
Vehicle Tracking Control (VTC)
Flow Barriers (Wattles, Rock Socks, etc.) (RS)
Concrete Washout Area (CWA)
Preventative Maintenance Activities/Meetings/etc.
Silt Fence (SF)
Permanent
Mulching/Sealant
Permanent Seed Planting
Sewer Service
Water Service
Curb and Gutter
Rip Rap (RP)
Erosion Control Fabric (EF)
C6.00
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPERTY BOUNDARY
BENCHMARK/BASIS OF BEARING:
SILT FENCE SF SF
RIPRAP w/ TURF REINFORCEMENT MAT RP
1. CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2. SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3. CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4. REFER TO THE DRAINAGE REPORT - N/A BY NORTHERN ENGINEERING FOR
ADDITIONAL INFORMATION.
GENERAL NOTES:
WATTLE DIKE WD
CONCRETE WASH AREA CWA
VERTICAL TRACKING CONTROL VTC
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 29-01
LOCATED ON THE SOUTH SIDE OF PROSPECT ROAD, EAST OF THE
INTERSECTION OF THE WEST FRONTAGE ROAD OF I-25 AND PROSPECT ROAD,
EAST OF THE COLORADO WELCOME CENTER, ON A CONCRETE HEADWALL TO
AN IRRIGATION PIPE.
ELEVATION=4904.41
CITY OF FORT COLLINS BENCHMARK 47-01
SOUTH SIDE OF PROSPECT ROAD WHERE IT INTERSECTS I-25, ON THE WEST
END OF THE PARAPET WALL TO THE BRIDGE (B 16 AM) OVER I-25 , ON A DEPT
OF HIGHWAYS BRASS CAP.
ELEVATION=4934.13
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM.
SURROUNDING DEVELOPMENTS HAVE USED NGVD29 UNADJUSTED (PRIOR
CITY OF FORT COLLINS DATUM) FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS
REQUIRED FOR ANY PURPOSE, THE FOLLOWING EQUATION SHOULD BE USED:
NGVD29 (PRIOR CITY OF FORT COLLINS DATUM) = NAVD88 - 3.19'
BASIS OF BEARINGS
BASIS OF BEARINGS IS THE NORTH LINE OF THE NORTHEAST QUARTER OF
SECTION 21, TOWNSHIP 7 NORTH, RANGE 68 WEST OF THE 6TH P.M. AS
BEARING NORTH 88° 21' 24" WEST (ASSUMED BEARING).
Northern Engineering responses by:
Benjamin Ruch
Project Engineer
Erosion control Plan
has been updated per
Round 1 comments.
X
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X X X X
X
X
X
X
X X
X X X
X
X
X
X X
X
/
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/ / / / / / / /
F
E
S
LID
LID
LID
M
SS
SS
SS
SS
SS
SS
SS
S
S
VAULT
ELEC
/ / / / / / / /
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PROPOSED
CULVERT
PROPOSED 36"
RCP CULVERT
A
14.40 AC
B
22.57 AC
A
B
E PROSPECT RD
INTERSTATE 25
REST AREA ACCESS RD
SW FRONTAGE ROAD
SW FRONTAGE ROAD
SW FRONTAGE ROAD
INTERSTATE 25
PROPOSED 2 - 36"
RCP CULVERTS
CULVERT 2
CULVERT 3
EAST
SWALE
WEST
SWALE
NORTH
KEYMAP
F
E
S
M
VAULT
ELEC
INTERSTATE 25
PROSPECT ROAD
MCLAUGHLIN LN
( IN FEET )
1 inch = ft.
100 0 100 Feet
100
200 300
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
PROPOSED INLET
A
DESIGN POINT
FLOW ARROW
DRAINAGE BASIN LABEL
DRAINAGE BASIN BOUNDARY
BENCHMARK
FOR DRAINAGE REVIEW ONLY
NOT FOR CONSTRUCTION
C
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 2-01
LOCATED ON THE NORTH SIDE OF HORSETOOTH ROAD ON THE CONCRETE BASE OF
THE WEST GATE POST TO THE LARGE GRAVEL PIT APPROX. 1/2 MILE EAST OF ZIEGLER
ROAD.
ELEVATION=4861.39
CITY OF FORT COLLINS BENCHMARK 29-01
LOCATED ON THE SOUTH SIDE OF PROSPECT ROAD, EAST OF THE INTERSECTION OF
THE WEST FRONTAGE ROAD OF I-25 AND PROSPECT ROAD, EAST OF THE COLORADO
WELCOME CENTER, ON A CONCRETE HEADWALL TO AN IRRIGATION PIPE.
ELEVATION=4904.41
BASIS OF BEARINGS
ASSUMING THE NORTH LINE OF THE NORTHEAST QUARTER OF SECTION 21, T.7N.,
R.69W., AS BEARING NORTH 88°38'29" WEST BEING A GRID BEARING OF THE COLORADO
STATE PLANE COORDINATE SYSTEM, NORTH ZONE, NORTH AMERICAN DATUM 1983/92,
A DISTANCE OF 2642.40 FEET WITH ALL OTHER BEARINGS CONTAINED HEREIN
RELATIVE THERETO.
CONCEPTUAL DRAINAGE EXHIBIT
ULTIMATE SITE
FORT COLLINS, CO
CSURF PROPERTY
E NGINEER ING
N O R T H E RN
DECEMBER 7, 2018
D:\PROJECTS\232-043\DWG\EXHIBITS\232-043_FUTURE DRAINAGE.DWG
Rational Summary (Proposed)
Basin ID
Basin Area
(s.f.)
Basin Area
(ac)
Composite
% Imperv.
Flow,
WQ
(cfs)
Flow,
Q2
(cfs)
Flow,
Q100
(cfs)
A 627028 14.39 90% 10.27 20.53 79.60
B 983024 22.57 90% 14.22 28.43 109.90
CONCEPTUAL
ULTIMATE SITE PLAN
INTERSTATE 25
CSURF
EXISTING ASPHALT ROAD
TO BE REMOVED
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ELEC
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INTERSTATE 25
CSURF
PROPOSED ASPHALT ROAD
ASPHALT
SURFACE
AREA (SF) % IMPERV.
IMPERV.
AREA (SF)
82,441 100% ASPHALT
SURFACE
AREA (SF) % IMPERV.
IMPERV.
AREA (SF)
66,053 100%
EXISTING PROPOSED
82,441 66,053
D:\PROJECTS\232-043\DWG\DRNG\232-043_IMPERVIOUS.DWG
CSURF PROPERTY
INTERSTATE 25 / PROSPECT ROAD
FORT COLLINS
301 N. Howes Street, Suite 100 COLORADO
Fort Collins, Colorado 80521
E NGINEER ING
N O R T H E RN
PHONE: 970.221.4158
www.northernengineering.com
DESCRIPTION
EXISTING VS. PROPOSED
IMPERVIOUS AREA
DRAWN BY
B. RUCH
DATE
DECEMBER 7, 2018
PROJECT
232-043 SK-C1
SCALE DRAWING
1"=300'
V
(ft/s)
Tt
(min)
2-yr
Tc
(min)
10-yr
Tc
(min)
100-yr
Tc
(min)
A A NO 0.25 0.25 0.31 0 N/A N/A N/A N/A 1775 0.50% 1.41 20.9 0 NA N/A N/A 21 21 21
B B No 0.25 0.25 0.31 0 N/A N/A N/A N/A 2225 0.50% 1.41 26.2 0 NA N/A N/A 26 26 26
DEVELOPED TIME OF CONCENTRATION COMPUTATIONS
Gutter Flow Swale Flow
Design
Point
Basin
Overland Flow
B. Ruch
December 4, 2018
Time of Concentration
(Equation RO-4)
( )
3
1
1 . 87 1 . 1 *
S
C Cf L
Ti
= −