HomeMy WebLinkAboutSite Certifications - 12/20/201712/15 Page 1
OVERALL SITE and DRAINAGE CERTIFICATION
Commercial, Multi-Family and Subdivision Certification Form and Checklist
Project Name:
Date:
Building Permit Numbers:
(Commercial or multi-family)
Per the requirement in Fort Collins Stormwater Criteria Manual (FCSCM) Volume 1, Section 6.11, please fill in
all applicable items in this Certification Form for Commercial, Multi-Family and Overall Single Family sites.
NOTE: several items must be verified during construction. A copy of the approved grading plan must be
submitted with the as-built grading plan. (As-built elevations must be written in red next to the approved
elevations.)
•Use “Yes” for items completed as described.
•Use “N/A” for items that are not applicable to the site being certified.
•If any blanks are “No,” attach an explanation referencing the item number below.
Attach an explanation or description of the as-built condition for any items listed or for anything not listed but
shown on the approved construction plans.
Provide an as-built redline or Mylar drawing with the following:
I.Water Quality and Quantity Detention Basin Certification - FCSCM Vol.2, Ch.10
For multiple detention basins on a site, provide the following for each basin separately:
A. Volume: As-built topographic verification is attached at 1-foot (or less) contour intervals and
volume verification calculations for the water quality capture volume and the 100-year detention storage
volume.
1. Detention basin topography was prepared by a professional land surveyor registered in the state
of Colorado.
2.Both proposed and as-built contours are shown on the same plan sheet (dashed lines for
proposed and solid lines for as-built).
3.All critical spot elevations as shown on the approved construction plans have been verified and
the as-built elevations are shown on the plan sheet.
4.Stage-storage-discharge tables are provided on a separate document.
5.Verification that designed drain time is in compliance with Colorado Revised Statute § 37-92-
602(8) is attached and has been uploaded to the Statewide Compliance Portal
(tinyurl.com/COCompliancePortal) for approval. Uploaded documents must include:
a.The cover sheet from the approved drainage report
b.The stamped certification page from the approved drainage report
c.As-built topographic survey
d.Stamped certification page from the Overall Site & Drainage Certification
e.PDF output from the Stormwater Detention and Infiltration Design Data Speadsheet
12/15 Page 2
B.Water Quality and Quantity Detention Basin Grading: Attached is as-built verification that there is
a minimum 2% positive fall into the concrete trickle pans or flow-line(s) from all areas in the bottom of
the detention pond. If there is a “soft pan” in the flow-line, all areas still must meet the minimum 2%
grade requirement.
1.Low Flow: Choose one of the following detention basin low flow options as applicable:
a. Turf swale for low flow path in detention basin.
There is a minimum 2% grade in the flow-line(s) of the detention basin. The flattest as-built grade
is .
b.Concrete pan for low flow in detention basin.
There is a concrete pan installed that meets the grades as shown on the approved construction
plans. (Show as-built spot elevations.)
c.Soft pan for low flow in detention basin.
•Verify and document the soft pan material gradation, trench width and depth - to be verified
during construction by engineer. Picture documentation is preferred or engineer’s statement of
visual inspection and compliance. (Choose one below.)
o There is a soft pan with an underdrain installed that meets the design on the approved
construction plans. (Show the underdrain grades, bedding material, geotextile, spot elevations,
bends, cleanouts, etc.)
o There is soft pan installed without an underdrain but there is a type A or B soil. The soil
type must be documented by supplying verification from a registered professional geotechnical
engineer.
NOTE: Spot elevations are to be within 0.2 ft. +/-.
2. Side Slopes: The as-built side slopes of the detention basin have been calculated and are shown.
Indicate the side slope with an arrow and a numerical value (e.g., 6.25:1). The maximum slope allowed
is 4:1. Small areas of 3:1 may be acceptable, but slopes steeper than 3:1 must be stabilized or re-
graded. Provide documentation if a variance was granted for steeper slopes during the design process.
3.Spillway Certification: The following items must be field verified:
a.The location of the spillway is indicated on the as-built plan.
b.The width of the spillway is indicated on the as-built plan.
c.The elevation(s) of the spillway is shown on the as-built plan.
d.A concrete ribbon defines the location and grade of the spillway.
e.There is downstream scour protection in the spillway as per the construction plans. Indicate
type: (riprap size “D50” gradation and bedding type, geotextile, buried
riprap with inches of bury, etc.).
f.There are no obstructions in the spillway, such as trees, bushes, sidewalks, landscape
features, rocks, etc.
12/15 Page 3
4.Outlet Structure Certification
a.The orifice plate for the approved release rate is installed with the correct size and location of
the orifice.
b.The orifice plate for the water quality outlet is installed with the correct hole size, number of
rows and columns of holes.
c.The bottom hole on both the water quality and quantity outlets are at the bottom of the plate
so no water ponds in front of the plate.
d.The well screen is the correct material and is installed as shown on the construction plans.
e.100-year overflow grate elevation is . (Elev. A on detail D-46)
f.The top elevation of the water quality capture volume is . (Elev. B on detail
D-46)
g.Overflow grate is made of the correct material, has the correct bar spacing, is hinged at the
top and bolted at the bottom.
h.The bottom of the outlet box has no obstructions or misalignments that will cause it to retain
runoff water and is sloped at 2% towards outlet.
II.Channels/Swales - FCSCM Vol.1, Ch.7, Sect.3&4
A. Capacity: The as-built capacity of all the major channels and swales has been verified. They meet
or exceed capacity requirements shown in the approved drainage study for this project.
1.All swales are located within the drainage easements as shown on the construction plans.
2.Longitudinal slopes and side-slopes (cross-sections) have been verified. Design criteria requires
longitudinal slopes of 2% min. (on vegetated swales) and side-slopes no steeper than 4:1. If these
criteria are not met, the certification engineer will write a justification and propose mitigation for each
instance or have the issues corrected. If variances to these criteria have previously been approved and
are shown on the construction plans, no justification is needed.
3.As-built spot elevations on channels/swales are shown that correspond to spot elevations
shown on the approved construction plans.
4.All permanent erosion control measures are installed as shown on the approved construction
plans (e.g., drop structures, riprap, TRMs, etc.). (Include pictures and verification of the materials used
as part of this verification.)
5.All pans, curbs, storm pipes or other appurtenances appropriately tie into each other in the
system. (Pictures at tie-in points suggested.)
6.The minimum freeboard is provided for all channels and swales as shown on the approved
construction plans or as identified in the approved drainage study. (Show the freeboard provided on
the cross-sections as on the construction plan set or attached as separate documentation.)
7.The low flow portion of all channels or swales is clear of obstructions. (No landscaping, trees,
shrubs, sod, etc. infringe on the low flow portion of channels or swales.)
12/15 Page 4
III.Storm Pipes (aka storm drains) - FCSCM Vol.1, Ch.6, Sec. 4
A. Storm Drain Pipe Capacity: The as-built capacity of all pipes installed on this project has been
verified and meets or exceeds the capacity requirements shown in the approved drainage study for this
project.
1.All storm drain pipe sizes and materials have been verified and are in conformance with the
approved construction plans. (Indicate on the plan and profile sheets that they have been verified.)
Material and size substitutions must be approved prior to installation. If a pipe size or material was
changed during construction, the certification engineer must attach the approval documents or supply
them with this certification. Approval documents must include a calculation documenting the capacity
equivalency (equal or greater) of the substituted size.
2.The longitudinal slope of the pipe is as shown on the approved construction plans. The
acceptable minimum slope is 0.4%. All slopes flatter than the designed slope on the construction plans
must be justified with capacity calculations on an attached sheet.
3.The as-built invert elevations have been verified and are shown on the plan and profile sheets of
the approved construction plans.
B.Storm Drain Pipe Installation Requirements: All pipes are installed in accordance with the
approved construction plans.
1.The minimum cover requirements for all pipes have been met as shown on the approved
construction plans. These will be called out in critical locations.
2.All encasements and clearances as specified on the approved construction plans have been met.
3.Any specific joint types or construction methods specified on the approved construction plans
have been met. (List on a separate sheet and attach to this certification.)
IV.Concrete Pans - FCSCM Vol.1, Ch.7, Sec.4.1.3.4
A. Construction/Installation: All concrete pans have been constructed in accordance with the
approved construction plans.
1.The concrete pans are the correct size/width as shown on the approved construction plans.
2.The longitudinal slopes of the pans are as shown on the approved construction plans. The
certification engineer must justify or mitigate longitudinal slopes less than the minimum of 0.4% unless
a flatter slope was approved and is shown on the approved construction plans. Provide mitigation or
justification by separate document.
3.The cross-section of the pan is as shown on the construction plans. (Specifically, the pan cross-
section is “V” shaped and meets the side slope shown on the detail.)
4.The concrete pans are a minimum of 6 inches thick without reinforcement and a minimum of 4
inches thick with a minimum of 6X6-W14xW14 reinforcement per detail D20B and D20C. (Provide
documentation of the reinforcement used if different than shown on the details or on the approved
construction plans.)
5.The spot elevations shown on the concrete pan(s) have been verified and are shown on the as-
built drawings.
12/15 Page 5
V. Storm Drain Inlets - FCSCM Vol.1, Ch.6, Sec. 3
A. Construction/Installation: All storm drain inlets have been constructed in accordance with the
approved construction plans.
1.The size and type of inlets are consistent with the inlets shown on the approved construction
plan. Indicate by writing “Verified” on each inlet on the plan sheet or list on a separate document the
inlet number(s), type and size (length). If the inlet installed is other than the one on the approved
construction plan detail sheet, provide the name and source of the detail with justification for equal or
better capacity.
2.The size of the inlet opening is consistent with the approved detail. (Check height and width.)
3.The elevation of the grate (if applicable) is at the elevation shown on the street profile or as
indicated by a spot elevation on the construction plans.
4.The as-built invert elevations of all pipes entering and leaving the inlet are shown on the plan
and profile sheets within construction tolerance of 0.2 feet. If substantially different, provide
justification and capacity calculations to show the capacity is not affected or propose mitigation.
5.The as-built size of the inlet box is as shown on the construction plans or an explanation or
justification is attached.
6.All inlet covers are stenciled or stamped with the following designation: NO DUMPING – DRAINS
TO POUDRE RIVER.
VI.Culverts - FCSCM Vol.2, Ch.9
A. Construction/Installation: All culverts have been constructed and/or installed in accordance with
the approved construction plans.
1.All culvert sizes have been verified as indicated on the as-built construction plans as correct.
2.The culvert material type for all culverts installed is as on the approved construction plans and is
indicated on the as-built plans.
3.The as-built invert “in and out” elevations have been verified and are indicated on the as-built
construction plans.
4.The culvert headwalls or wing walls have been installed as shown on the approved construction
plans. Headwalls or wing walls may be needed in the as-built conditions onsite if the slopes adjacent to
the culvert are greater than 4:1. Please note areas needing stabilization in the certification narrative.
An alternative to consider is a turf reinforcement mat (TRM).
VII.Sub-Drains
A. Construction/Installation: All sub-drains shown on the construction plans have been installed in
accordance with those plans. Sub-drains installed with the sanitary sewer are to be verified on the
sanitary sewer plan and profile sheets of the construction plans. (NOTE: Indicate any sub-drains installed
after the plans were approved on the as-built plans.)
1.The size of the sub-drains are as approved on the construction plans and are indicated on the as-
built plans.
2.The type of sub-drain, in particular the perforated and non-perforated sections of the drain, are
as indicated on the approved construction plans.
12/15 Page 6
3.The cover requirements per the construction plans are provided.
4.The cleanouts have been installed at the locations shown on the construction plans and are
accessible for cleaning. (Cleanouts can be buried a maximum of 6 inches deep with their locations
marked.)
5.The backfill materials for sub-drains are as shown on the approved construction plans. (This
includes the type, depth and width.)
6.The geo-textile liner completely wraps the sub-drain and the permeable backfill material unless
shown otherwise on the approved construction plans. (Sub-drain pipe wrapped in a sock filter material
is accepted only if approved prior to installation.)
VIII.Curb Cuts
A. Construction: All curb cut openings are constructed in accordance with the approved construction
plans.
1.The size (width) of the curb cut opening is as shown on the approved construction plans.
2.The curb cut openings tie into a downstream swale, pipe, or other appurtenances with a smooth
transition and there no obstructions such as riprap or sod impeding the flow downstream of the curb
cut.
IX.Sidewalk Culverts & Chases
A. Construction/Installation: All sidewalk culverts have been installed at the locations shown on the
approved construction plans.
1.The size (width and length) of the culverts are as shown on the approved construction plans.
2.The cover plate is a minimum 5/8-inch galvanized plate bolted to a galvanized angle iron per the
detail shown on the approved construction plans or per the City’s detail.
3.The sidewalk culvert invert “in and out” elevations have been verified and are indicated on the
as-built plans.
4.The sidewalk culvert opening is as shown on the approved construction plans or per the City’s
detail.
5.There is a smooth transition both on the inlet and outlet ends of the sidewalk culvert with no
obstructions such as riprap or sod impeding the flow into or out of the sidewalk culvert.
X. Site Grading
A. Construction: All common open spaces have been graded in accordance with the approved
construction plans.
1.The grading on all common open spaces bordering private lots has been verified as correct and
the as-built rear lot corner elevations have been shown on the as-built plans.
12/15 Page 7
2.The as-built contours for “overlot grading” are shown on the as-built construction plans for all
common open spaces, tracts, outlots, etc. If not in compliance, please attach a narrative describing the
situation for noncompliance and when it may be corrected. An escrow for overlot grading may be
required. (NOTE: Residential Lot Grading Certification is a separate process from this Overall Site
Certification. It is understood that residential lots will be brought to final grade once the foundation is
backfilled so they may be lower than the plan shows at this Overall Site Certification stage.)
3.All turf reinforcement mats (TRMs) have been installed as shown on the approved construction
plans and the slopes are stabilized.
XI.Riprap - FCSCM Vol.1, Ch.7, Sec.4.4.4.3
A. Construction: All riprap has been installed in the locations and sizes indicated on the approved
construction plans.
XII.Permanent Erosion Control Fabric - FCSCM Vol.1, Ch.7
A. Construction: All fabric has been installed in the locations and sizes indicated on the approved
construction plans.
1.All fabric was installed per the details on the approved construction plans.
XIII.Post-Construction Site Cleanup - FCSCM Vol.3, Ch.7
A. Construction: All construction debris and obstructions of any kind have been removed from
drainage paths.
1.All construction debris has been removed except in staging area(s).
2.All ruts have been smoothed out in all construction areas.
3.All areas needing reseeding have been identified and future stabilization goals have been
coordinated with the Erosion Control Inspector and in accordance with FCSCM Vol.2 Chapter 12. Note
the area needing stabilization in the narrative.
XIV.Certification of Other Permanent BMPs - FCSCM Vol.2, Ch.8, Sec.2 & FCSCM Vol.2, Ch.12
A.The construction of channel drop structures is in accordance with the approved plan both in
location, horizontal dimensions and cross-section.
XV.Certification of LID and Water Quality Facilities - FCSCM Vol.3, Ch.4
A.Attached are the During Construction Inspection Checklist for Low Impact Development (LID) and
other items to be verified during construction, along with pictures and other required documentation.
NOTE: SURVEY DOES
NOT REFLECT TRUE
TOP OF POND
ELEVATION. THE TOP
OF POND ELEVATION
HAS BEEN REVISED TO
MEET PROPOSED
ELEVATION OF 4962.71'
27+00
28+00
29+00
30+00
31+00
32+00
33+00
34+00
NOTE: SURVEY DOES NOT
REFLECT TRUE TOP OF POND
ELEVATION. THE TOP OF POND
ELEVATION HAS BEEN
REVISED TO MEET PROPOSED
ELEVATION OF 4962.71'
AS-BUILT BERM AT
ELEVATION 4962.71
OVERFLOW
SPILLWAY AT
ELEVATION 4961.71
WITH WIDTH OF 160'
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SCALE: 1" = 30'
60'30'0
22 SEP 2016
Project No.:11-358 Date:5/27/16
Project Name:Aspen Heights Student Housing
Basin I.D.:Expanded Interim Detention Basin
Contour Plan Depth Volume Increment
Elevation Area Interval Basin
(amsl)(s.f.)(ft)(c.f.)(c.f.)(ac-ft)
4953.00 10.00 0.00 0.00 0.00 0.000
4954.00 555.15 1.00 213.22 213.22 0.005
4955.00 11400.73 1.00 4,823.88 5,037.10 0.116
4956.00 39458.69 1.00 24,023.09 29,060.19 0.667
4957.00 93816.93 1.00 64,706.27 93,766.46 2.153
4957.50 117807.93 0.50 52,792.53 146,558.99 3.365
4958.00 135782.93 0.50 63,344.56 209,903.55 4.819
4959.00 155920.73 1.00 145,735.84 355,639.39 8.164
4960.00 162934.74 1.00 159,414.88 515,054.27 11.824
4961.00 169614.08 1.00 166,263.23 681,317.49 15.641
4962.00 176903.23 1.00 173,245.88 854,563.37 19.618
WQCV WSE =
100-yr + WQCV WSE =
- The required WQCV of 0.155 ac-ft is achieved at a WSE of 4955.36
- The required detention capacity to attenuate the 10-yr storm event, plus provide the
WQCV (total of 0.687 ac-ft), is satisfied at a WSE of:4956.47
- The required detention capacity to attenuate the 100-yr storm event, which includes
the WQCV (total of 18.48 ac-ft), is satisfied at a WSE of:4961.71
DETENTION BASIN STAGE-CAPACITY CURVE
Cummulative
Volume
4952.00
4953.00
4954.00
4955.00
4956.00
4957.00
4958.00
4959.00
4960.00
4961.00
4962.00
4963.00
-5.000 0.000 5.000 10.000 15.000 20.000 25.000
Co
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Detention Volume (ac-ft)
7047 E. Balancing Rock Rd., Scottsdale, AZ 85266 • Phone (303) 913-5382 • larrycowen@comcast.net
December 12, 2017
City of Fort Collins
Water Utilities Engineering
700 Wood Street
Fort Collins, CO 80524
Attention: Mr. Dan Mogen, EI, CFM
Development Review Engineer
RE: Aspen Heights Development
Site Certification
Dear Mr. Mogen,
Further to my submittal letter of October 24, 2017 and your subsequent email of November 7, 2017, I
believe that the final documentation requirements, as set out in your email, have been addressed in the
attached, updated record documents. Specifically:
• The City of Fort Collins Utility Plan Approval signatures have been transferred to the as-built record
drawings (for those drawings that were part of the approved set of construction drawings) and I have
been stamped and signed those as record drawings, with a dated notation in the revision block that
the drawings are “As-built Record Drawings”.
• The drawings showing the as-built grading of the north-south drainage channel have been stamped,
signed and dated, with the annotation that these are “As-built Record Drawings”.
• The Overall Site and Drainage Certification document has been updated, with current stamp,
signature and date.
• The as-built drawings showing the as-constructed invert and rim elevations of the manholes and the
final lengths and gradients of the pipe runs for both the storm drainage and sanitary sewer systems
are included for your records.
The additional explanatory information provided in my letter of October 24, 2017 remains applicable
to this submittal, and should be considered a part of this submittal. A copy of that letter is included
herewith for reference.
Accordingly, I believe that all of the items associated with grading and drainage at the Aspen Heights
project site have been addressed and documented, in compliance with the project requirements.
Therefore, we hereby respectfully request release of the surety provided in connection with the grading
and drainage improvements for the project, as well as payment of the reimbursement due to
Breckenridge Group Fort Collins Colorado, LLC for costs incurred by it in connection with the installation
of NECCO infrastructure within and adjacent to the project site.
Yours truly,
Owen Consulting Group, Inc.
Larry C. Owen, P.E.
Attachments
cc: Mr. Jonathan Nunn, Breckenridge Group Fort Collins Colorado, LLC
7047 E. Balancing Rock Rd., Scottsdale, AZ 85266 • Phone (303) 913-5382 • larrycowen@comcast.net
October 24, 2017
City of Fort Collins
Water Utilities Engineering
700 Wood Street
Fort Collins, CO 80524
Attention: Mr. Dan Mogen, EI, CFM
Development Review Engineer
RE: Aspen Heights Development
Site Certification
Dear Mr. Mogen,
I believe that we have now addressed all the punch list items set out in your various emails
regarding completion of the Site Certification for the Aspen Heights project. Following is a response
to the items enumerated in your email to me dated September 1, 2017, with reference to other items
of concern identified in previous communications.
1. North – South Drainage Channel
• The remedial work requested to modify the concrete pan forming the channel invert
downstream of the existing Conifer St. culverts and to stabilize the channel side slopes at
this location, as well as downstream of the Lupine Dr. culverts has been completed, and
accepted by the City. An as-built survey plot of the remedial work at the Conifer St. location
has previously been submitted to the City (duplicate copy attached hereto).
• Remedial work has also been completed at various locations along the edges of the trickle
pan, to rectify areas that had been eroded. These areas have been filled and revegetated.
• An as-built survey has now also been conducted throughout the length of the drainage
channel. A plot of the as-built survey is attached for your information.
2. Private Driveways and Parking Areas
• An as-built survey has been completed showing spot elevations at representative
locations throughout the private driveways and parking areas of the project site.
• Plots of the as-built survey are shown on four drawings, attached, corresponding
approximately to each of the four development phases of the project.
3. Common Areas
• The aggregate scope of the individual lot surveys, previously submitted to and accepted
by the City, includes all the common areas between and around the various buildings,
with the exception of the main north – south drainage channel and the area between the
private sidewalk and the public sidewalk along the east perimeter of the site adjacent to
Redwood St.
• The north – south drainage channel has been surveyed separately and is addressed in
the as-built survey plots referenced above.
• The area between the sidewalks along Redwood St. has not been independently
surveyed, however a visual inspection has been conducted of this area, and it has been
confirmed that the finished grade of this area slopes consistently and significantly toward
Mr. Dan Mogen
RE: Aspen Heights – Site Certification
October 24, 2017
Page 2 of 2
the street. Accordingly, it is our contention that no as-built survey is necessary to certify
that positive drainage away from the buildings is achieved throughout this area.
4. Detention Basin Outlet Structure
• Modifications have been made to the safety grate on the outlet structure at the southeast
corner of the detention basin, to ensure the security of the grate. Hinges have been
installed at the top corners of the grate to allow access into the outlet structure to
conduct maintenance, but the grate is secured with bolts at it’s lower corners to prevent
unauthorized access to the outlet structure.
• A photo of the finished grate is attached.
5. Pool and Sport Court
• Design and construction of the pool area and sport court was conducted independently
of the remainder of the project site, by a firm specializing in such work. As such, no
detailed as-built survey has been conducted of the pool or the pool deck area. It is our
understanding, however, that you waived your initial requirement for such a survey
during a field inspection with Michael Palizzi on November 30, 2016.
• As-built elevations of the four corners of the sport court are included on the plot of the
as-built survey of the private driveways and parking areas in Phase 1 of the project.
As stated at the outset of this letter, I believe that we have now addressed all of the punch
list items associated with grading and drainage at the Aspen Heights project site, and have
provided appropriate documentation of compliance with the project requirements. Accordingly,
we hereby respectfully request release of the surety provided in connection with the grading and
drainage improvements for the project, as well as payment of the reimbursement due to
Breckenridge Group Fort Collins Colorado, LLC for costs incurred by it in connection with the
installation of NECCO infrastructure within and adjacent to the project site, as documented in
previous separate submittals made to the City through Wes Lamarque.
Yours truly,
Owen Consulting Group, Inc.
Larry C. Owen, P.E.
Attachments
cc: Mr. Jonathan Nunn, Breckenridge Group Fort Collins Colorado, LLC
7047 E. Balancing Rock Rd., Scottsdale, AZ 85266 • Phone (303) 913-5382 • larrycowen@comcast.net
August 17, 2017
City of Fort Collins
Water Utilities Engineering
700 Wood Street
Fort Collins, CO 80524
Attention: Mr. Dan Mogen, EI, CFM
Development Review Engineer
RE: Aspen Heights Development
Site Certification
Dear Mr. Mogen,
This is to confirm our telephone conversation yesterday afternoon, during which it was agreed
that the required remedial activities associated with the storm drainage channel bisecting the Aspen
Heights development site, from the south side of Conifer Street to the north side of the interim
detention basin, have been completed to the satisfaction of the City of Fort Collins. The attached
exhibit shows representative as-built elevations of the concrete drainage pan, downstream of the
Conifer St. culverts, and it has been agreed that the adverse gradient indicated in the area
immediately downstream of the culvert outlets is acceptable as a condition that cannot be
reasonably overcome and will not result in any significant or long-term negative effect.
It is my contention that all other required remedial actions, identified subsequent to our submittal
of the Overall Site and Drainage Certification dated 10/31/16, have also been addressed to the
satisfaction of the City, notwithstanding any deficiencies that may be identified during the warranty
period.
Accordingly, I hereby respectfully request, on behalf of Breckenridge Group Fort Collins
Colorado, LLC., that the performance bond in the amount of $90,000.00, currently securing these
drainage improvements, be reduced to the amount specified as warranty surety, and that payment
be made to Breckenridge Group of the amount due as reimbursement for the NECCO improvements
installed in conjunction with the Aspen Heights development ($498,643.67).
Thank you for your assistance in resolving these issues. If you have any questions, please
contact me immediately.
Yours truly,
Owen Consulting Group, Inc.
Larry C. Owen, P.E.
cc: Ryan Fetgatter, Jon Nunn – Breckenridge Group
D
FES
FES
FES
FES
MANHOLE
RIM=4960.57
BTM=4948.73
30" RCP
FL=4959.22
30" RCP
FL=4959.24
30" RCP
FL=4959.24
18" RCP
FL=4960.27
MH
S00°08'52"W 777.84'
SLOPE = 0.75%
CONCRETE
CHANNEL
MANHOLE
RIM=4958.03
BTM=4972.90
MH
NORTH
21
+
0
0
22
+
0
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23
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40
1-800-922-1987
KEYMAP
NOT TO SCALE
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No
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1"=50'
200'
GRAPHIC SCALES
25'0'50'100'50'
HORIZ: 1 INCH = 50 FEET
20'2.5'0'5'10'5'
VERT: 1 INCH = 5 FEET
ASPEN HEIGHTS WAY
(PRIVATE DRIVE)
MARY JANE WAY
(PRIVATE DRIVE)
MARY JANE WAY
(PRIVATE DRIVE)
LU
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SEWER PROFILE NOTES:
1.ALL SANITARY SEWER CONSTRUCTION SHALL CONFORM TO THE
CITY OF FORT COLLINS WATER, WASTEWATER, AND STORMWATER
DEVELOPMENT CONSTRUCTION STANDARDS AND DETAILS.
2.ALL SEWER SERVICES SHALL BE A MINIMUM OF 4" DIAMETER
CONSTRUCTED AT A SLOPE OF 2%.
3.ALL 6" DIAMETER SEWER SERVICES SHALL BE CONSTRUCTED AT A
MINIMUM SLOPE OF 1%.
4.PROVIDE 10' HORIZONTAL CLEARANCE BETWEEN WATER AND
SEWER MAINS.
5.WHEN GROUNDWATER IS ENCOUNTERED CLAY CUT OFF WALLS
SHALL BE INSTALLED ON THE UPSTREAM SIDE OF ALL MANHOLES,
IN THE MID-SECTION OF EACH MAIN LINE RUN AT INTERVALS NOT
TO EXCEED 300-FEET, OR AS REQUIRED BY THE DISTRICT. SEE
DETAIL SHEET FOR CLAY CUT OFF WALL DETAIL.
MA
R
Y
J
A
N
E
W
A
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RECORD DRAWING
21
+
0
0
B
19
+
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16
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17
+
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41
1-800-922-1987
KEYMAP
NOT TO SCALE
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12 AUG 2014
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A
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1"=50'
200'
GRAPHIC SCALES
25'0'50'100'50'
HORIZ: 1 INCH = 50 FEET
20'2.5'0'5'10'5'
VERT: 1 INCH = 5 FEET
COPPER MOUNTAIN LANE
(PRIVATE DRIVE)
STEAMBOAT LANE
(PRIVATE DRIVE)SOL VISTA LANE
(PRIVATE DRIVE)
LU
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(PRIVATE DRIVE)
COPPER MOUNTAIN LANE
(PRIVATE DRIVE)
SEWER PROFILE NOTES:
1.ALL SANITARY SEWER CONSTRUCTION SHALL CONFORM TO THE
CITY OF FORT COLLINS WATER, WASTEWATER, AND STORMWATER
DEVELOPMENT CONSTRUCTION STANDARDS AND DETAILS.
2.ALL SEWER SERVICES SHALL BE A MINIMUM OF 4" DIAMETER
CONSTRUCTED AT A SLOPE OF 2%.
3.ALL 6" DIAMETER SEWER SERVICES SHALL BE CONSTRUCTED AT A
MINIMUM SLOPE OF 1%.
4.PROVIDE 10' HORIZONTAL CLEARANCE BETWEEN WATER AND
SEWER MAINS.
5.WHEN GROUNDWATER IS ENCOUNTERED CLAY CUT OFF WALLS
SHALL BE INSTALLED ON THE UPSTREAM SIDE OF ALL MANHOLES,
IN THE MID-SECTION OF EACH MAIN LINE RUN AT INTERVALS NOT
TO EXCEED 300-FEET, OR AS REQUIRED BY THE DISTRICT. SEE
DETAIL SHEET FOR CLAY CUT OFF WALL DETAIL.
SO
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A
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RECORD DRAWING
13
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14
+
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+
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13
+
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+
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1-800-922-1987
KEYMAP
NOT TO SCALE
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PROJECT:
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DATE:DRAWN BY:
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By
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,
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A
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,
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8
0
5
3
7
1"=50'
200'
GRAPHIC SCALES
25'0'50'100'50'
HORIZ: 1 INCH = 50 FEET
20'2.5'0'5'10'5'
VERT: 1 INCH = 5 FEET
ECHO MOUNTAIN LANE
(PRIVATE DRIVE)
TE
N
M
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L
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R
A
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L
A
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(P
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SEWER PROFILE NOTES:
1.ALL SANITARY SEWER CONSTRUCTION SHALL CONFORM TO THE
CITY OF FORT COLLINS WATER, WASTEWATER, AND STORMWATER
DEVELOPMENT CONSTRUCTION STANDARDS AND DETAILS.
2.ALL SEWER SERVICES SHALL BE A MINIMUM OF 4" DIAMETER
CONSTRUCTED AT A SLOPE OF 2%.
3.ALL 6" DIAMETER SEWER SERVICES SHALL BE CONSTRUCTED AT A
MINIMUM SLOPE OF 1%.
4.PROVIDE 10' HORIZONTAL CLEARANCE BETWEEN WATER AND
SEWER MAINS.
5.WHEN GROUNDWATER IS ENCOUNTERED CLAY CUT OFF WALLS
SHALL BE INSTALLED ON THE UPSTREAM SIDE OF ALL MANHOLES,
IN THE MID-SECTION OF EACH MAIN LINE RUN AT INTERVALS NOT
TO EXCEED 300-FEET, OR AS REQUIRED BY THE DISTRICT. SEE
DETAIL SHEET FOR CLAY CUT OFF WALL DETAIL.
EC
H
O
M
N
T
.
L
N
.
-
T
E
N
M
I
L
E
R
A
N
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E
&
PL
A
N
&
P
R
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F
I
L
E
RECORD DRAWING
(PRIVATE DRIVE)
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+
0
0
16
+
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45
1-800-922-1987
KEYMAP
NOT TO SCALE
ST
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R
M
S
E
W
E
R
P
L
A
N
/
P
R
O
F
I
L
E
-
2
200'
GRAPHIC SCALE
25'0'50'100'50'
HORIZ: 1 INCH = 50 FEET
No
.
Re
v
i
s
i
o
n
/
I
s
s
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Da
t
e
12
6
9
C
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A
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#
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(9
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PROJECT:
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DATE:DRAWN BY:
OCG
SCALE:
By
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37
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12 AUG 2014
70
AS
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8
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3
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1"=50'80'
GRAPHIC SCALE
10'0'20'40'20'
1 INCH = 20 FEET
VERT: 1 INCH = 5 FEET
VERT: 1 INCH = 1 FEET
ENLARGED WATER/SEWER CROSSING DETAIL
NOTE: ALL JUNCTION BOXES SHALL BE PRECAST
AND TO BE DESIGNED BY PRECAST ENGINEER
AND APPROVED BY CIVIL ENGINEER.
RECORD DRAWING