HomeMy WebLinkAboutLot Certifications - 06/13/20175/26/16 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 25% (4:1).
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
4-21-17 The Flats at Rigden Farm
2715 Iowa Drive B1600845
Fort Collins, CO 80525 8343000000
Building 5 N/A
Ryan Banning
4-21-17
Note: All calculations are based upon surveyed spots locations shown on elevation certification only
No adverse impacts are expected. Grading meets slope requirements
x
x
x
x
x
x
x
x
6/9/2017
RB
RB
RB
RB
Isolation requirements appear to have been met through elimination of porous
materials at ground level. No adverse impacts are expected
RB
RB
RB
RB
All areas where possible are 5% to swales. No adverse impacts are anticipated.
Some swales are 1% but convey adequately. No adverse impacts are anticipated
5/26/16 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
4
Ryan Banning
Ryan@northernengineering.com
970.221.4158
Northern Engineering
310 N. Howes Street, Suite 100
Fort Collins, CO 80521
Site remains under construction
x
x
x
x
x
04/21/17
RB
RB
RB
RB
RB
06.09.17
301 N. Howes Street, Suite 100, Fort Collins, CO 80521 970.221.4158 www.northernengineering.com
June 9, 2017
Dan Mogen, EI
Fort Collins Stormwater Utility
700 Wood Street
Fort Collins, CO 80521
RE: Grading Certifications
2715 Iowa Drive (The Flats at Rigden Farm)
Dear Mr. Mogen:
I have visited building 5 of The Flats at Rigden Farm at 2715 Iowa and we have performed asbuilt
survey of the grading and drainage structures shown on the attached asbuilt elevation certification.
The building grading generally conforms to the approved grading and drainage.
This certification is for the elevations and grading of the building envelope to the front walkway and
the elevations of the drive aisle directly adjacent to the attached garage bays. The elevation of the
ground surrounding the building is roughly 2 inches below the finished floor and top of foundation.
Level of cold joint waterproofing per the plan is unknown. The building fascia is entirely masonry so
no isolation issues exist requiring additional separation from porous materials. Landscaping grade
where adjacent to the building is above 5% in all pervious areas surrounding the building. No
adverse impacts are anticipated from minor areas that remain below 5%.
The rim elevation of the inlets are general lower than design except in the northeast corner however
no drainage issues are anticipated due to this change. All swales have sufficient slope and overflow
locations are at appropriate elevations to provide adequate flood protection.
Overall site certification has been provided.
Thank you and please let me know if you have any questions or concerns.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
Ryan O. Banning, P.E.
Project Manager