HomeMy WebLinkAboutLot Certifications - 07/09/2021 (4)6614 E. Brilliant Sky Dr., Scottsdale, AZ 85266 • Phone (303) 913-5382 • larrycowen@comcast.net
July 8, 2021
City of Fort Collins
Stormwater Engineering and Development Review Division
700 N. Wood St.
Fort Collins, CO 80522
Attention: Mr. Wes Lamarque
RE: Ridgewood Hills Fourth Filing – Tract A
Building #4 - Certification of Lot Grading
Dear Wes,
The attached Certification of Lot Grading form and Exhibit 1 document the as-built grading and
drainage improvements in the immediate vicinity of Building 4 of the Ridgewood Hills Apartments
south of Avondale Rd. and east of Triangle Dr. in Ridgewood Hills.
During the course of construction and final grading of the portion of the site immediately adjacent
to this building, it was deemed necessary to make a number of minor modifications and additions to
the approved grading plan for the project to improve the efficiency of collection and conveyance of
runoff immediately away from the building and into the overall drainage system for the site. Please
note that none of the modifications compromised the overall concept or integrity of the approved
grading plan, but the modifications did necessitate a few “No” responses on the Certification form.
Explanatory comments have been added to the form for each “No” response.
I trust that the attached documentation will be acceptable. In our recent email communications,
you indicated that the process had been initiated to return the escrow monies, in the amount of
$3,000, deposited with the City as security for the completion of lot grading certifications for
previously completed buildings. Those monies have not yet been returned to the developer.
Therefore, I respectfully request that those escrow funds be retained, for the time being, and
allocated to this submittal, as security for completion and approval of the lot grading certification for
Building 4, addressed herein. I understand that a further administrative fee, in the amount of $200,
will be payable in connection with this current submittal. A copy of an “Escrow Submittal, Certificate
of Occupancy Sheet” for Building 4 is attached hereto, indicating the requirement for payment of a
$200 Administrative Fee.
Thank you for your consideration of the attached documentation. If you have any questions or
comments, please contact me immediately.
Yours truly,
Owen Consulting Group, Inc.
Larry C. Owen, P.E.
cc: Mr. Bill Timm, M. Timm Development, Inc.
Mr. Kevin Egan, M. Timm Development, Inc.
Wes Lamarque
7/9/2021
2/14/17 Page 1
CERTIFICATION OF LOT GRADING
Pursuant to Fort Collins City Code § 26-544 & City Land Use Code § 3.3.2 (e)
Date:
Address:
Lot: Block:
Subdivision:
Permit Application #:
Larimer County Parcel #:
Larimer County Reception #:
(on development agreement)
I, (print) , a Colorado registered professional engineer, verify that construction
of all stormwater facilities and grading is complete and hereby submit this certification.
Please answer the following questions by initialing the appropriate response. For each question initialed “No,” attach an
explanation detailing how this will affect stormwater drainage for this lot and any adjacent lots.
1.Certification includes attached Stormwater-approved grading plan. (NOTE: City’s
Building Department does not approve grading plans).
2.Certification includes the attached as-built survey dated (must be within 60
days of the date the certification is submitted) accurately and truthfully depicting
elevations for:
Top of foundation/finished floor
Finished grade on each side of the structure
Quarter points along each lot line (not more than 50 feet apart)
Break points/high points
Swales
Berms
Retaining walls
Air conditioning pads
Window wells
Any other appurtenance(s) within an easement
3.All elevations are within a 0.2 foot tolerance of the approved grading plan.
4.The top of foundation is at least 6 inches above the highest grade surrounding the
structure.
5.There is a minimum grade of 5% away from the structure within the first 5 to 10 feet
adjacent to the residence.
6.All slopes meet or exceed the minimum requirement of 2% (1% is acceptable on single
family lots when the swale is draining the runoff from only two adjoining properties)
and are not steeper than 33% (3:1).
7.All flow lines of stormwater drainage swales are a minimum of 6 inches below the
elevation of ground adjacent to the structure and will direct drainage as shown on the
Stormwater-approved grading plan.
8.All downspout locations and discharge directions are shown on the as-built survey.
Runoff is directed into an appropriate drainage system or lot line swale, and it is not
directed onto neighboring properties.
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
2/14/17 Page 2
9.A smooth transition with no vertical offset (step) in grade is provided at the lot line to all
adjacent properties.
10.The grading of this lot does not adversely affect neighboring properties or City
infrastructure.
11.Landscaping has been completed prior to survey. If not, please indicate who will be
responsible for completing landscaping:
12.Final site cleanup has been completed.
13.I personally visited the site as part of the certification process, and in my professional
opinion, the as-built survey is an accurate representation of the site conditions..
No Yes
No Yes
No Yes
No Yes
No Yes
14.Based on this information, I certify that (check one):
□The elevations and drainage patterns of the lot/site are in substantial conformance with the City
approved drainage and grading plan for the property (information attached).
□The elevations and drainage patterns of the lot/site as measured are in general conformance with the
City approved drainage plan with exceptions (information attached). In my professional judgment the
elevations and grading of the lot/site as constructed are functionally adequate and equivalent to the
specifically approved drainage plan, and will affect stormwater drainage on and off the lot/site in a
manner consistent with the approved drainage plan.
Name:
Email:
Phone:
Company:
Address:
NOTE: A complete certification must be submitted at least two weeks prior to a request for a Certificate of Occupancy
for the lot/site, including, but not limited to, drawings of the lot/site showing the approved design and as-built surveyed
elevations of all structures, drainage and grading features, written information/explanation of discrepancies, and other
information necessary to confirm the above certification to:
Email (preferred)
WaterUtilitiesEng@fcgov.com
Mailing Address
Fort Collins Utilities
ATTN: Water Utilities Engineering
281 North College Avenue
Fort Collins, CO 80521
Questions?
970-221-6700
PE Stamp
Sign and date
Sheet:
Of:
Date:
Job No:
Drawn:
Design:
Scale:
Checked:
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BUILDING 4
FFE = 5089.50
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AREA INLET
AREA INLET
AREA INLET
PIPED TIE-IN TO
STORM DRAIN
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12.4%17.5%
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GEOTEXTILE WRAPPED PERFORATED PIPE IS INSTALLED BEHIND EACH SECTION OF RETAINING
WALL TO INTERCEPT SURFACE RUNOFF THAT MIGRATES TO AND DOWN THE UPSTREAM FACE
OF THE WALL. THE PERFORATED PIPE RUNS ARE CONNECTED TO TIGHT PIPE TO CONVEY
COLLECTED RUNOFF BENEATH THE WALL AND SIDEWALK, DISCHARGING TO TREATMENT /
DETENTION FACILITIES. THE SECTIONS OF PERFORATED PIPE ARE ALSO EQUIPPED WITH
VERTICAL RISER PIPES TO ALLOW FOR FLUSHING OF THE PERFORATED PIPE.
AS PART OF THE COMPLETION OF THE LANDSCAPING OF THE AREAS UPSTREAM OF THE
RETAINING WALLS, THE ROOF DRAIN DOWNSPOUTS WILL BE CONNECTED TO THE CLEANOUT
RISER PIPES TO PROVIDE A DIRECT DRAINAGE CONDUIT FOR ROOF RUNOFF, MITIGATING THE
AMOUNT OF WATER THAT WILL MIGRATE DOWN THE UPSTREAM FACE OF THE RETAINING WALLS.