HomeMy WebLinkAboutHOMESTEAD AT CLARENDON HILLS - FDP200032 - - UTILITY PLANS (6)SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
DECEMBER 2020
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:
VICINITY MAP
NORTH
PROJECT DATUM: NAVD88
City of Fort Collins Benchmark 5-02
1/2 mile south of Harmony Road, approximately 200 feet north of Wooded Creek Court, on the west side
of Shields Street, on the northwest corner of a storm inlet.
ELEV.= 5089.11
City of Fort Collins Benchmark 8-13
Southeast corner of Harmony Rd. and Shields St. on the northeast corner of a concrete traffic signal base.
ELEV.= 5086.71
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 - 3.20'
Basis of Bearings
The Basis of Bearings is the West line of Section 2-6-69 as bearing North 00° 17' 10" East (assumed
bearing).
Northern Engineering Services, Inc.
Project No. 1013-008
Date: November 2018
ORIGINAL FIELD SURVEY BY:
PROJECT BENCHMARKS:
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.
before you dig.Call
R
PROJECT TEAM:
CONTACT INFORMATION
PROJECT TEAM:
SHEET INDEX
UTILITY CONTACT LIST: *
UTILITY COMPANY
* This list is provided as a courtesy reference only. Northern Engineering Services assumes no responsibility for
the accuracy or completeness of this list. In no way shall this list relinquish the Contractor's responsibility for
locating all utilities prior to commencing any construction activity. Please contact the Utility Notification Center of
Colorado (UNCC) at 811 for additional information.
PHONE NUMBER
GAS-----------------Xcel Energy---------------------------------Pat Kreager (970) 225-7840
ELECTRIC--------City of Fort Collins Light & Power-----Rob Irish (970) 224-6167
CABLE-------------Comcast-------------------------------------Don Kapperman (970) 567-0425
TELECOM.--------CenturyLink---------------------------------William Johnson (970) 377-6401
WATER------------Fort Collins-Loveland Water District--Chris Pletcher (970) 226-3104
WASTEWATER--South Fort Collins Sanitation District-Chris Pletcher (970) 226-3104
STORMWATER-City of Fort Collins Utilities--------------Shane Boyle (970) 221-6339
PROJECT
LOCATIONS. SHIELDS STREETFRONT RANGE
COMMUNITY
COLLEGE
W. HARMONY ROAD
CS1 COVER SHEET1
1 CS1 COVER SHEET
2 CS2 GENERAL & CONSTRUCTION NOTES
3 EX1 EXISTING CONDITIONS
4 P1 PAVING PLAN
5 U1 UTILITY PLAN
6 SS1 SANITARY LINES 17-1 & 17-2 PLAN & PROFILE
7 ST1 STORM SEWER A PLAN & PROFILE
8 G1 GRADING PLAN
9 G2 GRADING DETAILS
10 D1 SANITARY DETAILS
11 D2 WATER DETAILS
12 - 15 D3 - D6 SITE & DRAINAGE DETAILS
16 ER1 EROSION CONTROL PLAN
17 ER2 EROSION CONTROL DETAILS
18 DR1 HISTORIC DRAINAGE EXHIBIT
19 DR2 PROPOSED DRAINAGE EXHIBITCLARENDON HILLS DRIVEHOMESTEAD AT CLARENDON HILLS
A TRACT OF LAND LOCATED IN THE WEST HALF OF SECTION 2, TOWNSHIP 6 NORTH, RANGE 69 WEST OF
THE 6TH PRINCIPAL MERIDIAN, CITY OF FORT COLLINS, COUNTY OF LARIMER, STATE OF COLORADO
FINAL UTILITY PLANS FOR
Kristin Turner
TB Group
444 Mountain Avenue
Berthoud, Colorado 80513
(970) 532-5891
Kenneth R. Mitchell
Mosaic Real Estate LLC
1021 Nightingale Drive
Fort Collins, Colorado. 80525
970 685 1575
Northern Engineering Services, Inc.
Andy Reese
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
(970) 221-4158
E N G I N E E R N GI
EHTRON R N
PLANNER/
LANDSCAPE ARCHITECT
DEVELOPER/APPLICANT
SITE ENGINEER
GEOTECHNICAL ENGINEER
Earth Engineering Company, Inc.
Michael J. Coley, PE
4396 Greenfield Drive
Windsor, Colorado 80550
(970) 545-3908
ENVIRONMENTAL
Blue Mountain Environmental Consulting, LLC
Matt Tobler
937 Mallard Drive
Fort Collins, Colorado 80521
(970) 224-0851
Northern Engineering Services, Inc.
Bob Tessely, PLS
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
(970) 221-4158
E N G I N E E R N GI
EHTRON R N
SITE ENGINEER
All changes, addendums, additions, deletions and
modifications to these drawings must be approved,
in writing, by the Fort Collins-Loveland
Water District and the South Fort Collins Sanitation District.
District Engineer Date
FORT COLLINS - LOVELAND
WATER DISTRICT
SOUTH FORT COLLINS
SANITATION DISTRICT
Datum
1/20/2021
This does not match the title
on this sheet.
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
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.
before you dig.Call
R
CS2 GENERAL & CONSTRUCTION NOTES2
A. GENERAL NOTES
1.All materials, workmanship, and construction of public 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 Final Drainage Letter for Homestead at Clarendon Hills, dated December 18, 2020 by Northern Engineering 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
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 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 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 City of Fort Collins.
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 5-02
1/2 mile south of Harmony Road, approximately 200 feet north of Wooded Creek Court, on the west side of Shields Street, on the northwest
corner of a storm inlet.
Elev. = 5089.11
City of Fort Collins Benchmark 8-13
Southeast corner of Harmony Rd. and Shields St. on the northeast corner of a concrete traffic signal base.
Elev. = 5086.71
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 - 3.20'
Basis of Bearings
The Basis of Bearings is the West line of Section 2-6-69 as bearing North 00° 17' 10" East (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:
1) Water quality treatment for entire site (Stormwater)
2) Level of Service (Transportation)
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.For additional information see separate Stormwater Management Plan / Erosion Control Report for Homestead at Clarendon Hills.
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 Final Drainage Letter for Homestead at Clarendon Hills, dated December 18, 2020 by Northern Engineering 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.
E. Utility Notes
1.All water and sanitary sewer construction shall be performed according to the Fort Collins-Loveland Water District and the South Fort Collins
Sanitation District standards and specifications.
2.Construction of water and sewer facilities require a pre-construction meeting with district operations staff prior to construction.
3.Contractor shall notify district inspectors prior to starting work.
4.Contractor shall contact the Sanitation District for sewer inspection 48 hours prior to connecting to existing sewer stubs.
5.All commercial domestic services require a reduced pressure backflow prevention device.
6.All water lines shall be a minimum of (5) five feet and a maximum of (6) six feet below final grade.
7.All district valves shall only be operated by district operations staff.
8.Pipe pressure and vacuum testing shall be witnessed by district inspectors. waterline bacteria tests shall also be taken by district inspectors.
9.Once the system is operational and all tests have passed, contractor shall request substantial completion with a letter to the district that includes
the dollar value of the water and sewer improvements listed separately.
10.As-builts shall be submitted in pdf and dwg to the district for final approval.
11.If groundwater is encountered within depth of sewer construction, manholes must be water-proofed.
Datum
1/20/2021
VAULT
ELEC
ELECE
E
VAULT
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E
W
AL
K
12' UTILITY
EASEMENT
15' UTILITY
EASEMENT
FRONT RANGE
COMMUNITY COLLEGE
CLARENDON HILLS
FIRST FILING
5' DRAINAGE
EASEMENT (TYP.)
LOT 1
LOT 2
LOT 3
LOT 6
LOT 5
LOT 7
LOT 8
LOT 4
4.5'
S
I
D
E
W
A
L
K
PROPOSED POND
9' UTILITY EASEMENT
15' UTILITY
EASEMENT
9' UTILI
T
Y
E
A
S
E
M
E
N
T
19' UTILITY EASEMENT
10' UTILITY
EASEMENT
4' GRAVEL TRAILTRACT A
TRACT B
SMITH LATE
R
A
L
EXISTING P
R
I
V
A
T
E
L
Y
O
W
N
E
D
IRRIGATION
D
I
T
C
H
(
S
E
E
N
O
T
E
9
)
DITCH ACCESS EASEMENT
(WIDTH VARIES - SEE NOTE 9)
UD
UD
CLARENDON HILLS DRIVE
LANG
D
A
L
E
D
RI
V
E (91.97)92.
0
9
90.
9
8
(0.6%)8.1%2.0%2.4%2.1%3.0%
TELECOMMUNICATION
EASEMENT
EXISTING 18"
RCP IRRIGATION
EXISTING
IRRIGATION
STRUCTURE
EXISTING 18"
STEEL IRRIGATION
EXISTING 30" VERTICAL
CURB & GUTTER
PROPOSED 31" DRIVE-OVER
CURB & GUTTER
EXISTING 6'
CROSS-PAN
EXISTING IRRIGATION
CONTROL (TYP.)
EXISTING
LANDSCAPE WALL
91.
8
1
EXISTING
WETLAND AREA
EXISTING IRRIGATION
STRUCTURE
92.4990.
6
0
90.
5
6
92.2590.3691.
8
2
91.
0
9
90.
6
4 6:111:12.0%2.1%12.0%1.5%1.5%9.6%1.5%1.5%2.5%2.4%7.7%2.0%2.0%4.6%2.7%2.6%PROPOSED OUTLET STRUCTURE
CONSTRUCTED AS PART OF WALL
PROPOSED RAIN
GARDEN WITH FOREBAY
PROPOSED RAIN GARDEN
WITH FOREBAY
PROPOSED RETAINING WALL WITH WEIR
TO DIVIDE POND FROM RAIN GARDEN
PROPOSED RETAINING WALL TO
DIVIDE POND FROM RAIN GARDEN
PROPOSED RETAINING WALL4:11.8
%8:1PROPOSED 2' WIDE CONCRETE SIDEWALK
CULVERT WITH CONCRETE CHASE
PROPOSED OUTLET PIPE
93.
4
2
HP
91.96
HP
94.15
HP
2.1%
???
90.
4
8
FL/
L
P
91.
0
8
FL/
H
P
89.
5
9
FL/
L
P
90.
1
5
LP
91.
6
2
HP
1.6%
1.6%
1.0%1.6%2.6%5
:
1
4:14:1
???2.2%92.87
HP
2.
2%
2.0%
90.
0
7
FL
90.
9
0
FL9:19:15:1
4:
1
3.
5
%2.6%2.5%3.
0%2.9%2.2%2.
8
%
4.
3
%92.81(9
0
.
8
3
)2.2%
2
.
6%
EMERGENCY SPILL PATH FOR POND
WILL OCCUR IN CURB AND GUTTER
AT WEST DRIVEWAY ENTRANCE
PROPOSED RETAINING WALL
92.78
HP
93.24
HP93.48HP92.83HP92.0492.572.6%90.54
TW
90.
2
3
B
W
91.42
TW
91.
1
6
B
W
91.94
TW
91.
6
8
B
W
89.01
TW/B
W
92.05
TW/B
W
12'
93.
3
4 2.3%4:1GRADE
BREAK
GRAD
E
BREA
K
GRAD
E
BREA
K
GRA
D
E
BRE
A
K
91.
6
8
FL
33.9 LF 12" HDPE @ 0.50%
WITH INVERT IN = 5090.34
AND INVERT OUT = 5090.17
INSTALL 12" FES AT INVERTS.
92.
5
0
92.
5
0
ROUGH GRADE
DRIVEWAY FOR LOT 7 11:1
94.
0
9
HP
93.
2
2
HP
92.
8
5
HP
93.
6
1
HP
93.
7
8
HP
92.
5
5
HP
92.
4
5
HP
94.13
HP
92.9793.5693.40
92.25
93.
1
2
91.56
92.29
A
A
A
A
A
A
A
T
G1 GRADING PLAN8
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.
before you dig.Call
R
NORTH
( IN FEET )
1 inch = ft.
Feet03030
30
60 90
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
LEGEND:
PROPOSED CONTOUR
EXISTING CONTOUR
PROPERTY BOUNDARY
PROPOSED SPOT ELEVATION 33.43
PROPOSED SLOPES
1.THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN
SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY
THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE
COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL
UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR FOR ALL UNKNOWN UNDERGROUND
UTILITIES.
2.REFER TO THE PLAT FOR LOT AREAS, TRACT SIZES, EASEMENTS, LOT DIMENSIONS, UTILITY
EASEMENTS, OTHER EASEMENTS, AND OTHER SURVEY INFORMATION.
3.ALL CURB SPOTS SHOWN ARE FLOWLINE ELEVATIONS. ALL OTHER SPOTS ARE FINISHED GRADE
ELEVATIONS.
4.ALL PROJECT DATA IS ON THE CITY OF FORT COLLINS VERTICAL DATUM NAVD88. SEE COVER SHEET
FOR BENCHMARK REFERENCES.
5.THE CONTRACTOR IS RESPONSIBLE FOR FIELD LOCATING AND VERIFYING ELEVATIONS OF ALL
CURBS AND GUTTERS AT THE POINTS OF CONNECTION SHOWN ON THE PLANS PRIOR TO INSTALLING
ANY OF THE NEW IMPROVEMENTS. IF A CONFLICT EXISTS AND/OR A DESIGN MODIFICATION IS
REQUIRED, THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER TO MODIFY THE DESIGN.
6.ADD 5000-FT TO PROPOSED CONTOURS, SPOT ELEVATIONS, AND FFE LABELS, WHERE TRUNCATED.
7.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BE MAINTAINED IN A NATIVE LANDSCAPE.
PLEASE SEE SECTION 3.4.1 OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN THE NATURAL
HABITAT BUFFER ZONE.
8.CONTRACTOR SHALL REFER TO AND COORDINATE WITH THE LANDSCAPE DRAWINGS FOR ALL
LANDSCAPE AND SITE FEATURES SUCH AS RETAINING WALLS, LANDSCAPE ROCK, TREES,
LANDSCAPING, MULCH, FENCING, ETC.
9.THE SMITH LATERAL IS OWNED BY NUMEROUS INDIVIDUAL OWNERS AS WELL AS THE CITY OF FORT
COLLINS (THROUGH THE PARKS DEPARTMENT) WHO USE THE DITCH TO CONVEY IRRIGATION
WATER. APPROVAL FROM THE IRRIGATION DITCH OWNERS IS REQUIRED PRIOR TO ANY WORK ON
THE DITCH OR IN ITS EASEMENT, AS WELL AS BEFORE ANY STORMWATER CAN BE DISCHARGED, OR
PLANNED TO BE DISCHARGED INTO THE DITCH. PLEASE CONTACT JILL WUERTZ (970_416_2062), 413
S. BRYAN AVE, FORT COLLINS, CO 80521 REGARDING THE PARKS' DEPARTMENT'S INTEREST.
NOTES:
2.0%
(47.45
)
EXISTING SPOT ELEVATION
PROPOSED STORM DRAIN / IRRIGATION
EXISTING CURB AND GUTTER
PROPOSED SWALE
PROPOSED LOT LINE
EASEMENT
Line Over Text
Line Over Text
1/20/2021
UDUD/ / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / /CLARENDON HILLS DRIVEEXISTING 4' SIDEWALK9' UTILITY EASEMENTRAIN GARDEN4.5' SIDEWALK1.6%0.5%0.5%2.6%2.6%2.5%1.2%2.7%4.0%2.0%1.9%3.0%2.6%4.0%3.2%2.8%2.5%EXISTING 30" VERTICALCURB & GUTTER1' CURB CUT9' UTILITY EASEMENT(2.8%)(2.8%)GRADEBREAK90.3690.4190.0689.8989.90(89.98)(90.40)90.11(89.57)90.2090.14LP89.59FL/LP89.90LP89.65FL89.70FL89.80FL/HP89.54FL(89.41)FL90.20FL89.87FL(90.27)FL(90.96)EMERGENCYSPILLWAYFOR PONDEXISTING 30" VERTICALCURB & GUTTERMATCH INTO EXISTINGMATCH INTO EXISTINGRETAINING WALLBY OTHERS90.02FL90.20FL90.3290.3690.60FL90.46FL90.71(91.21)(91.37)1.0%1.0%2.0%2.0%2.0%2' WIDE VALLEY PAN89.71FL2.0%2.4%90.3289.8989.98(90.92)UD/ / / / / / / // / / / / / / // / / / / / / // / / / / / / /L
A
N
G
D
A
L
E
D
R
I
V
E
4
.
5
'
S
ID
EW
A
L
KRAIN GARDENGRAD
EBREAK
4.
5
'
S
I
D
EW
A
L
K
1.5%0.
5%
1.
6%31" DRIVE-OVERCURB & GUTTER4.6%2.2%
2.5%4.0%2.2%
1.7%2.2%2.1%2.2%2.2%2.2%1.0%(2
.
4
%
)(2.3%)FOREBAYGRADEBREAK(90.92)90.9790.79(90.61)(90.25)(90
.81
)FL(90.78)FL(90.22)FL(90.13)FL(90.51)FL90.96FL90.59FL/HP91.09LP90.48FL90.96GRATE90.7690.48FL89.68FL90.60TW89.60TW88.60BW90.60TW2.0%5:15:188.60BW88.60BW90.4289.983.9%5:17:12.1%5:131" DRIVE-OVERCURB & GUTTERPROPOSEDTRENCH DRAINRETAINING WALLBY OTHERS90.6090.5990.681.4%1.6%90.80GRATE90.44GRATE89.30INV4:14:14:110:110:12.4%5:190.5091.4891.5790.89FL90.50FLMATCH TO EXISTINGFLOWLINE(4
.
0
%
)1.9%2.0%UD
UD
UDUDUDUDUDUDUDUDUDUDFOFOFOFOFOFO/ / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / // / / / / / / /RAIN GARDENRAIN GARDEN5:1
2.1%10.00' SANITARYSEWEREASEMENTL
A
N
G
D
A
L
E
D
R
I
V
ECLARENDON HILLS DRIVEPROPOSED POND100-YEAR WSE = 5089.414.5' SIDEWALK4.
5
'
S
I
D
EW
A
L
K
31" DRIVE-OVERCURB & GUTTER1.6%EXISTING 30" VERTICALCURB & GUTTER1' CURB CUT9' UTILITY EASEMENTGR
A
D
E
B
R
E
A
K
GRADEBREAKGRADEBREAKGRADEBREAK89.59FL/LP91.30FL/HP91.65TW91.62TW91.57TW90.88TW90.60TW90.36TW90.6890.6890.6890.6490.60TW90.60TW90.6890.60TW90.6890.60TW90.6890.33TW90.60TW90.60TW90.68TW88.60BW88.60BW88.60BW87.84BW89.22BW86.95BW86.96BW87.45BW86.73BW90.60TW88.60BW88.60BW90.69BW88.92BW88.04BW87.65BW88.60BW88.60BW88.60BW88.60BW88.89BW90.38TW90.6887.7088.001.8%2.3%
2.3%1.8%2.3%
2.3%
2.2
%
2.2%2.6%2.6%2.2%
8:
14:15:13:14:15:14:14:1
4:1 2.0%
2.0%2.1%2.0%2.0%2.0%RETAINING WALLBY OTHERSRETAINING WALLBY OTHERSRETAINING WALLBY OTHERSRETAINING WALLBY OTHERS1.6%1.6%1.0%1.0%4.5' SIDEWALK4.
5
'
S
I
D
EW
A
L
K2' WIDE CONCRETE CHASEHANDICAP RAMP (TYP.)PROPOSED DRIVEWAYVERTICAL CURBAND GUTTEREMERGENCYSPILLWAYFOR PONDOUTLET PIPEOUTLET STRUCTURE2' WIDE METALSIDEWALK CULVERTHEADWALL91.19TW88.45BW8
7
.
4
3
86.73INV(85.58)FL85.58INV85.62INV90.6890.60TW87.42BW90.6890.60TW87.11BW88.60BW5:190.6090.680.5%(85.23)FL(84.96)FL(85
.71
)FL(87.78)FL85.43FL1.
5
%4.1%(3
.
6
%
)6.0%7.2%2.0%4.7%85.9286.0186.0285.9286.1586.2486.1486.2586.6086.512.0
%MATCH TO EXISTINGMATCH TO EXISTINGMATCH TO EXISTINGFLOWLINEMATCH TO EXISTINGFLOWLINEMATCH TO EXISTINGFLOWLINEMATCH TO EXISTINGFLOWLINEMATCH TO EXISTING(5.1%)(3
.
1
%
)
(3
.
8
%
)
(4
.
0
%
)2.0%1.9%2.0%31" DRIVE-OVERCURB & GUTTER30" VERTICALCURB & GUTTER2' WIDE VALLEY PAN90.60TW90.60TW100-YR WSE88.60BW89.40BW91.83TW89.11BW90.24TW89.07BW89.76TW88.43BWRETAINING WALL FOR TREE(RE: LANDSCAPE ARCHITECT)RETAINING WALL FOR TREE(RE: LANDSCAPE ARCHITECT)PROVIDE 10' WIDEWEIR AT ELEV. 5089.70PROVIDE 24" INLINE DRAIN WITH LENGTH = 3.5'18" DIA. HDPE PIPE AT 0.5%. DAYLIGHT PIPE ATPOND BOTTOM. RIM OF DRAIN = 5089.60.PROVIDE 24" INLINE DRAIN WITHLENGTH = 3.5' 18" DIA. HDPE PIPEAT 0.5%. DAYLIGHT PIPE AT PONDBOTTOM. RIM OF DRAIN = 5089.60.SheetHOMESTEAD AT CLARENDON HILLS 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 CO
N
S
T
R
U
C
T
I
O
N
REVIEW SE
T
E N G I N E E R N GI
EHTRON R N
FORT COLLINS: 301 North Howes Street, Suite 100, 80521
GREELEY: 820 8th Street, 80631
970.221.4158
northernengineering.comof 19G2GRADING DETAILS9CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOUDIG, GRADE, OR EXCAVATE FOR THE MARKING OFUNDERGROUND MEMBER UTILITIES.CALL UTILITY NOTIFICATION CENTER OFCOLORADOKnow what'sbelow.before you dig.CallRNORTHLEGEND:PROPOSED CONTOUREXISTING CONTOURPROPERTY BOUNDARYPROPOSED SPOT ELEVATION33.43PROPOSED SLOPESNOTES:2.0%(47.45)EXISTING SPOT ELEVATIONPROPOSED STORM DRAIN / IRRIGATIONEXISTING CURB AND GUTTERPROPOSED SWALEPROPOSED LOT LINEEASEMENTCLARENDON HILLS DRIVE ENTRANCEA( IN FEET )0101020301 INCH = 10 FEETLANGDALE DRIVE ENTRANCEBDETENTION POND AND RAIN GARDENSC1.THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHENSHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFYTHE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORECOMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALLUNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR FOR ALL UNKNOWN UNDERGROUNDUTILITIES.2.REFER TO THE PLAT FOR LOT AREAS, TRACT SIZES, EASEMENTS, LOT DIMENSIONS, UTILITYEASEMENTS, OTHER EASEMENTS, AND OTHER SURVEY INFORMATION.3.ALL CURB SPOTS SHOWN ARE FLOWLINE ELEVATIONS. ALL OTHER SPOTS ARE FINISHED GRADEELEVATIONS.4.ALL PROJECT DATA IS ON THE CITY OF FORT COLLINS VERTICAL DATUM NAVD88. SEE COVER SHEETFOR BENCHMARK REFERENCES.5.THE CONTRACTOR IS RESPONSIBLE FOR FIELD LOCATING AND VERIFYING ELEVATIONS OF ALLCURBS AND GUTTERS AT THE POINTS OF CONNECTION SHOWN ON THE PLANS PRIOR TO INSTALLINGANY OF THE NEW IMPROVEMENTS. IF A CONFLICT EXISTS AND/OR A DESIGN MODIFICATION ISREQUIRED, THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER TO MODIFY THE DESIGN.6.ADD 5000-FT TO PROPOSED CONTOURS, SPOT ELEVATIONS, AND FFE LABELS, WHERE TRUNCATED.7.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BE MAINTAINED IN A NATIVE LANDSCAPE.PLEASE SEE SECTION 3.4.1 OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN THE NATURALHABITAT BUFFER ZONE.8.CONTRACTOR SHALL REFER TO AND COORDINATE WITH THE LANDSCAPE DRAWINGS FOR ALLLANDSCAPE AND SITE FEATURES SUCH AS RETAINING WALLS, LANDSCAPE ROCK, TREES,LANDSCAPING, MULCH, FENCING, ETC.9.THE SMITH LATERAL IS OWNED BY NUMEROUS INDIVIDUAL OWNERS AS WELL AS THE CITY OF FORTCOLLINS (THROUGH THE PARKS DEPARTMENT) WHO USE THE DITCH TO CONVEY IRRIGATIONWATER. APPROVAL FROM THE IRRIGATION DITCH OWNERS IS REQUIRED PRIOR TO ANY WORK ONTHE DITCH OR IN ITS EASEMENT, AS WELL AS BEFORE ANY STORMWATER CAN BE DISCHARGED, ORPLANNED TO BE DISCHARGED INTO THE DITCH. PLEASE CONTACT JILL WUERTZ (970_416_2062), 413S. BRYAN AVE, FORT COLLINS, CO 80521 REGARDING THE PARKS' DEPARTMENT'S INTEREST.HP = HIGH POINTLP = LOW POINTFL = FLOWLINEINV = INVERTTW = FINISH GROUNDAT TOP OF WALLBW = FINISH GROUNDAT BOTTOM OF WALLEMERGENCY OVERFLOW PATH**All circled are line over text.**1/20/2021
ANCHOR-18 IN. O.C.
NO. 3 REBAR
ANGLE
GALVANIZED
3x2x3/8 IN.
1 IN.
1/4 IN.
3
IN
.
BOTTOM OF TRENCH DRAIN
FLOWLINE
TOP OF GRATE FINISHED GRADE
(SEE GRADING PLAN)
INVERT
ELEV. = 5088.64
FINISHED GRADE
ELEV. = 5090.44
FINISHED GRADE
ELEV. = 5090.97
34.5'
INVERT
ELEV. = 5089.16
INVERT
ELEV. = 5089.29
FLOWLINE
OF SWALE
FLOWLINE OF
FOREBAY / / / / / / / /SEE DETAIL "F"
B
B PLAN VIEW
SECTION A-A
SECTION B-B
DETAIL "F"
A A
1.5%
DIRECTION
OF FLOW
1.5%
1.5%
C
C
D
D
E
E
42.8'
VERTICAL CURB AND
GUTTER (SEE PLANS)
FLOWLINE
RADIUS = 0.75'
VERTICAL CURB AND
GUTTER (SEE PLANS)
FLOWLINE
RADIUS = 5'
EDGE OF ASPHALT
H20 TRAFFIC RATED GRATE.
COORDINATE GRATE PATTERN
WITH LANDSCAPE ARCHITECT
6" MIN.
1.67'
1'
SEE DETAIL "G"
2.67'
2'
SEE DETAIL "F"
SECTION C-C
6" MIN.
1.83'
SEE DETAIL "G"
2.33'
2'
SEE DETAIL "F"
SECTION D-D
6" MIN.
6" MIN.6" MIN
2'
SECTION E-E
6" MIN.
2'
DIRECTION
OF FLOW
6" MIN.1'1'6" MIN.6" MIN 1'
VARIES, SEE
SECTION A-A
3"
6"
4"
1'
6"
6"
DETAIL "G"
FINISHED GRADE
ELEV. = 5090.73
INVERT
ELEV. = 5088.90
SLOPE TOP OF FOREBAY
TO MATCH GRADING PLAN
FLOWLINE OF NOTCH
4'
5'5'5'
5'
PROPOSED CONCRETE
EXISTING
CONCRETE
15'EXISTING
CONCRETE
DIRECTION
OF FLOW
PLAN VIEW
A
FLOWLINE OF
TRENCH DRAIN
TOP FOREBAYFLOWLINE OF NOTCH
SECTION A-A
TRENCH DRAIN
GRATE
RETAINING WALL
0.5%
A
6"
6"
4" NOTCH
2.5'
2.5'
6"18"
1'
8.8'
6"
RAIN GARDEN
TRENCH DRAIN
6"
6"
4"
NOTCH
2.5'
2.5'
3.5'
6"
5.3'
CURB CUT
TOP BACK
OF CURB
FLOWLINE
VALLEY PAN
LIP OF GUTTER
RAIN GARDEN
PLAN VIEW
DIRECTION
OF FLOW
A
A
FLOWLINE
CURB CUT
SLOPE TOP OF FOREBAY
TO MATCH GRADING PLAN
FLOWLINE OF NOTCH
0.5%6"
12"
6"
2.5'
CURB AND
GUTTER
CONCRETE RUNDOWN
SECTION A-A
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
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.
before you dig.Call
R
D5 SITE & DRAINAGE DETAILS14
HANDICAP SIDEWALK PASSING DETAIL504
TRENCH DRAIN AT LANGDALE DRIVE ENTRANCE503
FOREBAY AT EAST RAIN GARDEN
(NEAR LANGDALE DRIVE ENTRANCE)500 SECTION A-A FOR FOREBAY AT WEST RAIN GARDEN501
FOREBAY AT WEST RAIN GARDEN (NEAR
CLARENDON HILLS DRIVE ENTRANCE)502
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1/20/2021
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LAN
G
D
A
L
E
D
RI
V
E
9' UTILITY EASEMENT
EXISTING 4' SIDEWALK
12' UTILITY
EASEMENT
15' UTILITY
EASEMENT
FRONT RANGE
COMMUNITY COLLEGE
CLARENDON HILLS
FIRST FILING
EXISTING 18"
RCP IRRIGATION
EXISTING
IRRIGATION
STRUCTURE
EXISTING 18"
STEEL IRRIGATION
EXISTING 30" VERTICAL
CURB & GUTTER
EXISTING 31" DRIVE-OVER
CURB & GUTTER
EXISTING 6'
CROSS-PAN
EXISTING IRRIGATION
CONTROL (TYP.)
EXISTING
LANDSCAPE WALL
CONNECT TO EXISTING
IRRIGATION PIPE
SF SF SF
SF
SF
SF
SF
SF
SF
SF
CWA
VTCSF
SF SF
SF
SW
IP
RSRS
RS
RS
RS
RS
PROVIDE INLET
PROTECTION FOR
DOWNSTREAM INLET
EXISTING
WETLAND AREA
4.5' SIDEWALK
4.5'
S
I
D
E
W
A
L
K
PROPOSED
POND
LOT 1
LOT 2
LOT 3
LOT 6
LOT 5
LOT 7
LOT 8
LOT 4
RS
IP
SFSFSFSFSFSFSF
SF
SF
SF
SF
SF
RS
SMITH
L
A
T
E
R
A
L
EXISTI
N
G
P
RI
V
A
T
E
L
Y
O
W
N
E
D
IRRIGA
TI
O
N
DI
T
C
H
(
S
E
E
N
O
T
E
6
)
SW
SW
SW
SW
SW
SW
SW
SW
IP
IP
IP
RS
SW
ER1 EROSION CONTROL PLAN16
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: Homestead at Clarendon Hills
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
Structural "Installation"
Flow Barriers (Bales, Wattles, etc.) (RS)
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION
VERTICAL
INSTALLATION LANDSCAPE DEMOBILIZATION
Concrete Washout Area (CWA)
* All Temporary BMPs to be Removed once Construction is Complete
Vehicle Tracking Pad * (VTC)
Silt Fence (SF)
NORTH
( IN FEET )
1 inch = ft.
Feet03030
30
60 90
BENCHMARK
NOTE:
ALL BMPS SHOWN ON THIS PLAN ARE GRAPHIC
REPRESENTATIONS ONLY. FINAL DETERMINATION OF SIZE
AND LOCATION SHALL BE DETERMINED BY THE CONTRACTOR
AND DOCUMENTED ON THE DYNAMIC SITE PLAN.
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY CRIMP MULCHING OR
SIMILAR METHODS.
2.TOTAL DISTURBED AREA = 2.63 ACRES
3.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
4.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE WASHOUT AREA IF
ACCESS IS OFF PAVEMENT.
5.REFER TO THE FINAL DRAINAGE LETTER FOR HOMESTEAD AT CLARENDON HILLS, BY NORTHERN
ENGINEERING, FOR ADDITIONAL INFORMATION.
6.THE SMITH LATERAL IS OWNED BY NUMEROUS INDIVIDUAL OWNERS AS WELL AS THE CITY OF FORT
COLLINS (THROUGH THE PARKS DEPARTMENT) WHO USE THE DITCH TO CONVEY IRRIGATION
WATER. APPROVAL FROM THE IRRIGATION DITCH OWNERS IS REQUIRED PRIOR TO ANY WORK ON
THE DITCH OR IN ITS EASEMENT, AS WELL AS BEFORE ANY STORMWATER CAN BE DISCHARGED, OR
PLANNED TO BE DISCHARGED INTO THE DITCH. PLEASE CONTACT JILL WUERTZ (970-416-2062), 413
S. BRYAN AVE, FORT COLLINS, CO 80521 REGARDING THE PARKS' DEPARTMENT'S INTEREST.
GENERAL NOTES:
LEGEND:
PROPOSED CONTOUR
PROPOSED STORM SEWER / IRRIGATION
EXISTING CONTOUR
EXISTING CURB & GUTTER
PROPERTY BOUNDARY
VEHICLE TRACKING CONTROL PAD
SILT FENCE SF
CONCRETE WASHOUT
ROCK SOCK
CWA
RS
VTC
SF
INLET PROTECTION IP
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 5-02
1/2 MILE SOUTH OF HARMONY ROAD, APPROXIMATELY 200 FEET NORTH OF WOODED CREEK COURT, ON
THE WEST SIDE OF SHIELDS STREET, ON THE NORTHWEST CORNER OF A STORM INLET.
ELEV. = 5089.11
CITY OF FORT COLLINS BENCHMARK 8-13
SOUTHEAST CORNER OF HARMONY RD. AND SHIELDS ON THE NORTHEAST CORNER OF A CONCRETE
TRAFFIC SIGNAL BASE.
ELEV. = 5086.71
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 - 3.20'
BASIS OF BEARINGS
THE BASIS OF BEARINGS IS THE WEST LINE OF SECTION 2-6-69 AS BEARING NORTH 00° 17' 10" EAST
(ASSUMED BEARING).
STRAW WATTLE SW
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, 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.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE
PERMEABLE PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
10.ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE NECESSARY TO ENSURE THAT EACH BUILDING PAD IS STABILIZED THROUGHOUT
CONSTRUCTION. WATTLES SHALL BE PROVIDED AROUND BUILDING PAD SIDES TO ENSURE AT NO TIME SHALL SEDIMENT BE ALLOWED TO CROSS THE
PUBLIC SIDEWALKS.
11.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, GRAVEL SOCKS FOR PAVEMENT, ETC.)
12.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.
13.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.
14.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.
15.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.
16.CONTRACTOR SHALL EXERCISE CAUTION TO PROTECT RAIN GARDENS AND MODIFIED RAIN GARDEN FROM SEDIMENTATION. THIS INCLUDES EDUCATING
SUBCONTRACTORS ON-SITE.
17.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING, REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
18.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS SHALL BE KEPT TO A MINIMUM AND CLEANED NIGHTLY OR AT THE
SUGGESTION OF THE CITY'S EROSION CONTROL INSPECTOR.
19.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE TO A MINIMUM.
20.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM
ENTERING THE PERMEABLE PAVEMENT SYSTEM. LOOSE MATERIALS SHALL NOT BE STORED ON THE PERMEABLE PAVEMENT AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE PAVEMENT AREA. TEMPORARILY DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL
MEASURES AS NECESSARY TO REDUCE THE AMOUNT OF SEDIMENT RUN-ON TO THE PAVEMENT. SURFACE PROTECTION COULD INCLUDE COVERING AREAS
OF THE PAVEMENT, PROVIDING ALTERNATIVE CONSTRUCTION VEHICLE ACCESS, AND PROVIDING EDUCATION TO ALL PARTIES WORKING ONSITE.
EROSION CONTROL NOTES:
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.
before you dig.Call
R
Datum
1/20/2021
Line Over Text
VAULT
ELEC
ELECE
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VAULT
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CONTROL
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IRRCONTROL
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D
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E
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RI
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E
FRONT RANGE
COMMUNITY COLLEGE
CLARENDON HILLS
FIRST FILING
EX B
0.68 ac
EX A
2.38 ac
EX OS1
0.15 ac
EX OS2
0.06 ac
EX B
EX A
EX OS2
EX OS1
SMITH
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DR1 HISTORIC DRAINAGE EXHIBIT18
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.
before you dig.Call
R
NORTH
( IN FEET )
1 inch = ft.
Feet03030
30
60 90
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
LEGEND:
ADESIGN POINT
FLOW ARROW
DRAINAGE BASIN LABEL
EXISTING DRAINAGE BASIN BOUNDARY
FOR DRAINAGE REVIEW ONLY
NOT FOR CONSTRUCTION
C
PROPOSED CONTOUR
EXISTING CONTOUR
PROPERTY BOUNDARY
PROPOSED STORM DRAIN / IRRIGATION
EXISTING CURB AND GUTTER
PROPOSED SWALE
PROPOSED LOT LINE
EASEMENT
EXISTING DRAINAGE SUMMARY
Design
Point Basin ID
Total
Area
(acres)
C2 C100 2-Yr Tc
(min)
100-Yr Tc
(min)
Q2
(cfs)
Q100
(cfs)
ex a EX A 2.382 0.25 0.31 14.06 14.06 1.14 5.00
b EX B 0.684 0.25 0.31 12.06 12.06 0.35 1.53
b EX OS1 0.147 0.25 0.31 11.08 11.08 0.08 0.34
b EX OS2 0.064 0.25 0.31 5.42 5.42 0.05 0.20
NOTES:
1.REFER TO THE FINAL DRAINAGE LETTER FOR HOMESTEAD AT CLARENDON HILLS FOR ADDITIONAL
INFORMATION.
2.THE SMITH LATERAL IS OWNED BY NUMEROUS INDIVIDUAL OWNERS AS WELL AS THE CITY OF FORT
COLLINS (THROUGH THE PARKS DEPARTMENT) WHO USE THE DITCH TO CONVEY IRRIGATION
WATER. APPROVAL FROM THE IRRIGATION DITCH OWNERS IS REQUIRED PRIOR TO ANY WORK ON
THE DITCH OR IN ITS EASEMENT, AS WELL AS BEFORE ANY STORMWATER CAN BE DISCHARGED, OR
PLANNED TO BE DISCHARGED INTO THE DITCH. PLEASE CONTACT JILL WUERTZ (970-416-2062), 413 S.
BRYAN AVE, FORT COLLINS, CO 80521 REGARDING THE PARKS' DEPARTMENT'S INTEREST.
BENCHMARK
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 5-02
1/2 MILE SOUTH OF HARMONY ROAD, APPROXIMATELY 200 FEET NORTH OF WOODED CREEK COURT, ON
THE WEST SIDE OF SHIELDS STREET, ON THE NORTHWEST CORNER OF A STORM INLET.
ELEV. = 5089.11
CITY OF FORT COLLINS BENCHMARK 8-13
SOUTHEAST CORNER OF HARMONY RD. AND SHIELDS ON THE NORTHEAST CORNER OF A CONCRETE
TRAFFIC SIGNAL BASE.
ELEV. = 5086.71
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 - 3.20'
BASIS OF BEARINGS
THE BASIS OF BEARINGS IS THE WEST LINE OF SECTION 2-6-69 AS BEARING NORTH 00° 17' 10" EAST
(ASSUMED BEARING).
Datum
1/20/2021
CONTROL
IRR CONTROL
IRR CONTROL
IRR CONTROL
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E ACCESS EASEMENTLOT 6
LOT 7
LOT 8
B3
0.01 ac
OS1
0.09 ac
A
OS1
PROPOSED RAIN
GARDEN WITH FOREBAY
PROPOSED OUTLET STRUCTURE
CONSTRUCTED AS PART OF WALL
PROPOSED SIDEWALK CULVERT
PROPOSED
TRENCH DRAIN
PROPOSED
DRIVEWAY CULVERT
UNDERDRAIN
VAULT
ELEC
ELECE
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IRR
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IRR CONTROL
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FRONT RANGE
COMMUNITY COLLEGE
CLARENDON HILLS
FIRST FILING
LOT 1
LOT 2
LOT 3
LOT 5
LOT 4
TRACT A
A
1.37 ac
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0.04 ac
B2
1.63 ac
B4
0.01 ac
OS2
0.06 ac
PROPO
S
E
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W
A
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PROPOSED POND
WSE - 5089.41
B
TRACT B
DITCH ACCESS EASEMENT
(WIDTH VARIES - SEE NOTE 2)
SMITH
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UD
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PROPOSED RAIN GARDEN WITH FOREBAY
PROPOSED RETAINING WALL
(RE: LANDSCAPE ARCHITECT)
PROPOSED VERTICAL
CURB & GUTTER
PROPOSED OUTLET STRUCTURE
CONSTRUCTED AS PART OF WALL
PROPOSED SIDEWALK CULVERT
WITH CONCRETE CHASE
PROPOSED OUTLET PIPE
PROPOSED VALLEY PAN
POND OVERFLOW /
SPILLWAY ELEV. = 5089.80
UNDERDRAIN
PROVIDE WEIR IN RETAINING WALL AT ELEV.
5089.7 TO ALLOW EMERGENCY FLOWS FROM
POND TO SPILL INTO RAIN GARDEN.
ELEV. AT CURB CUT = 5089.59 TO ALLOW
EMERGENCY SPILLS TO FLOW INTO CURB
DR2 PROPOSED DRAINAGE EXHIBIT19
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.
before you dig.Call
R
NORTH
( IN FEET )
1 inch = ft.
Feet03030
30
60 90
SheetHOMESTEAD AT CLARENDON HILLSThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 19
LEGEND:
ADESIGN POINT
FLOW ARROW
DRAINAGE BASIN LABEL
NOTES:
1.REFER TO THE FINAL DRAINAGE LETTER FOR HOMESTEAD AT CLARENDON HILLS FOR ADDITIONAL
INFORMATION.
2.THE SMITH LATERAL IS OWNED BY NUMEROUS INDIVIDUAL OWNERS AS WELL AS THE CITY OF FORT
COLLINS (THROUGH THE PARKS DEPARTMENT) WHO USE THE DITCH TO CONVEY IRRIGATION
WATER. APPROVAL FROM THE IRRIGATION DITCH OWNERS IS REQUIRED PRIOR TO ANY WORK ON
THE DITCH OR IN ITS EASEMENT, AS WELL AS BEFORE ANY STORMWATER CAN BE DISCHARGED, OR
PLANNED TO BE DISCHARGED INTO THE DITCH. PLEASE CONTACT JILL WUERTZ (970-416-2062), 413 S.
BRYAN AVE, FORT COLLINS, CO 80521 REGARDING THE PARKS' DEPARTMENT'S INTEREST.
BENCHMARK
FOR DRAINAGE REVIEW ONLY
NOT FOR CONSTRUCTION
C
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 5-02
1/2 MILE SOUTH OF HARMONY ROAD, APPROXIMATELY 200 FEET NORTH OF WOODED CREEK COURT, ON
THE WEST SIDE OF SHIELDS STREET, ON THE NORTHWEST CORNER OF A STORM INLET.
ELEV. = 5089.11
CITY OF FORT COLLINS BENCHMARK 8-13
SOUTHEAST CORNER OF HARMONY RD. AND SHIELDS ON THE NORTHEAST CORNER OF A CONCRETE
TRAFFIC SIGNAL BASE.
ELEV. = 5086.71
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 - 3.20'
BASIS OF BEARINGS
THE BASIS OF BEARINGS IS THE WEST LINE OF SECTION 2-6-69 AS BEARING NORTH 00° 17' 10" EAST
(ASSUMED BEARING).
PROPOSED CONTOUR
EXISTING CONTOUR
PROPERTY BOUNDARY
PROPOSED STORM DRAIN / IRRIGATION
EXISTING CURB AND GUTTER
PROPOSED SWALE
PROPOSED LOT LINE
EASEMENT
DEVELOPED DRAINAGE SUMMARY
Design
Point Basin ID
Total
Area
(acres)
C2 C100 2-Yr Tc
(min)
100-Yr Tc
(min)
Q2
(cfs)
Q100
(cfs)
a A 1.368 0.24 0.30 14.25 14.25 0.63 2.74
b B1 0.041 0.29 0.36 12.03 12.03 0.02 0.10
b B2 1.630 0.60 0.75 12.74 12.74 1.98 8.65
b B3 0.013 0.20 0.25 12.26 12.26 0.01 0.02
b B4 0.070 0.25 0.31 11.04 11.04 0.04 0.16
os1 OS1 0.092 0.46 0.57 10.89 10.89 0.09 0.40
os2 OS2 0.064 0.25 0.31 5.00 5.00 0.05 0.20
Detention Pond and Rain Garden Summary
Description Required
Volume
(cu. ft.)
Design
Volume
(cu. ft.)
Release Rate
(cfs)
Crest of Pond
Elev.
Water
Surface Elev.
Freeboard
(ft)
Detention Pond 9,475 9,807 1.2 5090.6 5089.75 0.85
East Rain Garden 297 297 n/a 5090.6 5089.9 0.7
West Rain Garden 297 297 n/a 5090.6 5089.7 0.9
EXISTING DRAINAGE SUMMARY
Design
Point Basin ID
Total
Area
(acres)
C2 C100 2-Yr Tc
(min)
100-Yr Tc
(min)
Q2
(cfs)
Q100
(cfs)
ex a EX A 2.382 0.25 0.31 14.06 14.06 1.14 5.00
b EX B 0.684 0.25 0.31 12.06 12.06 0.35 1.53
b EX OS1 0.147 0.25 0.31 11.08 11.08 0.08 0.34
b EX OS2 0.064 0.25 0.31 5.42 5.42 0.05 0.20
PROPOSED DRAINAGE BASIN BOUNDARY
50' WETLANDS BUFFER
LID & WATER QUALITY SUMMARY
Project Summary
Total New Impervious Area 39,434 sf
Target LID Treatment Percentage 50%
Minimum Area to be Treated by LID measures 19,717 sf
Target Water Quality Treatment Percentage 100%
Minimum Area to be Treated by Water Quality measures 39,434 sf
LID Summary
Rain Gardens
Rain Garden Treatment Area 35,681 sf
Percent Total Project Area Treated 90.5%
East Rain Garden Volume (Required)297 cf
East Rain Garden Volume (Design)273 cf
West Rain Garden Volume (Required)297 cf
West Rain Garden Volume (Design)321 cf
Total Rain Garden Volume (Required)594 cf
Total Rain Garden Volume (Design)594 cf
Water Quality Summary
Detention
Detention Treatment Area 35,681 sf
Percent Total Project Area Treated 90.5%
Water Quality Volume (Required)1,187 cf
Storage Volume (Required)8,288 cf
Total Detention Volume (Required)9,475 cf
0.22 ac.-ft.
Total Detention Volume (Design)9,807 cf
0.23 ac.-ft.
POND INUNDATION AREA
EMERGENCY OVERFLOW PATH
Datum
1/20/2021