HomeMy WebLinkAboutLot Certifications - 08/14/2003%f
AIRES
ASSOCIATES
August 13, 2003
Mr. Jay Barber
City of Fort Collins
Stormwater Utility
700 Wood Street
Fort Collins, Colorado 80521
Re: Drainage Certification for Clocktower Lofts
Dear Jay,
Sri
We recently surveyed the parking lot and overlot grading improvements for the Clocktower Lofts
apartment building located at Wagner Drive and Birch Street to verify, whether the grading met the
intent of the approved grading and drainage plan. Spot elevations were checked at pertinent
locations and compared to the spot elevations shown on the grading plan. The enclosed drawings
show the design and as -built elevations. It is presumed that the design elevations shown are equal
to 5,000 plus the given elevation. The enclosed drawings show the design and as -built elevations.
In general, the lot and building meet the requirements of the grading and drainage plan and there is
positive drainage away from the.building on all sides. Survey points were taken at pertinent locations
to verify the conformance to the design elevations. The finished floor elevation of 34.98 is within
0.02 feet of the design elevation of 35.0. Approximately 80 spot elevations were surveyed at the
gutter and concrete pan flowlines of the parking lot. The largest discrepancy was approximately
0.25 feet. A positive slope is maintained at all locations in the parking lot and away from the
structures.
The invert elevations and slopes for the on -site storm drain were verified by survey. The results
indicate that pipe slope of 0.63 feet is slightly less than the design slope of 0.69 feet but is within
acceptable tolerances. The detention pond volume was also verified by survey. The pond was
designed to have a volume of 93.3 cubic yards and the survey indicated the as constructed volume
of 123.5 cubic yards. The top of the pond elevation is above the 100-year water surface elevation of
5031.86 on all sides.
It is my recommendation that the Certificate of Occupancy for this property be released since the
Contractor graded the lot to meet design drainage patterns. If you have any questions, please call.
Sincerely,
Owen Ayres & Associates, Inc.
Yohn Batka, P.E.
Project Engineer
JB:sp
Enclosure
Owen Ayres & Associates, Inc.'
Engineers/Scientists/Surveyors
3665 JFK Parkway, Building 2, Suite 200, P.O. Box 270460, Fort Collins, CO 80527
(970) 223-5556, Denver Metro (303) 572-1806, FAX (970) 223-5578
BARB8LT.DOC
32-0724.00
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2) RLL REWIRED PERIMETER 4LT IENCING S14111. BE INSTALLED Mind TO ARE MAID
DOWNING µTM1Y (SICCxRUNF STRAPPING, GWMMGU LTC.), µHE OTHER RfONMO
EAOSIN CONTRO YFASLPES 9WL 0E INSTALLED AT THE APPR AW TIME AS
NDICI ON ME AWP0.f➢ CO6 R0 N PLANS. AND EROSpX CONTROL REPORT.
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POSY!I.E. RESETµ OR DSNRBVICE O EXISTING AGETATM BWLL BE LIMITED TO
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SHORTEST POSSIBLE PERM OF TIME.
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HIMINVXµ TX . SIONFIWF FILLING, ETC.) SI HE XEPT IN A RWCHENED
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ME PROJECT STMR ROM-W-WAYS WALL REMAIN EXPOSED BY LAND DISTURBING
KTMh FOR MORE THAN THORN (SO) DAYS BEFORE REQUIRED 71DWORM' OR
PFRWyENT EROSION OMROL (E.G SEED/WLW. SOD. VNpSCWNG. ETC.) IB
1STN LED, UNUW OTHERWISE MP D W THE SIOMNAnR UTILITY OPMILQNT.
5) TIT WE SNA1 BE WATERED AMID MAMATLD AT ALL TREES WRING CONSTRUCTKKR
MIM[S s0 AS TO PREVENT REND -CAUSED FBOSION. ALL LAND D5 MN0
MIMYS SMALL SE IMMEDWELY OSCOMINUED WHEN FUGRM DUST IMPACTS
ADACEM PROPERTIES 4 DETERMINED BE A LPRESEMATNE OF THE CRY OF f0T
COU 1E.
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AMID I EPA EED OR RECCNSTRU M 45 NECESBAEY MER EAGI RUNOFF EVENT IN
ORDER 70 ASSURE C HUED PERFORNARCE OF THEIR INTENDED NNCEON. AL
RW ED SEDMENTS. PAPTICLIARLY RO E ON PAYED ROAO/IAY SURFACES. SMLI. SE
REMNED AND OSPoSED OF IN A MANNER AND LOCATION 50 AS XOT TO CAUSE THEM
RELGiE INTO AIRY OWWGEWAY.
J) NO BOIL STOCKPILE SHALL EXCEED TEN (10) FEET IN HEIOMI. AL BOL
SHMON ES WALL BE PROTECTED FROM SEDIMENT TRANSPoRT BY SURFACE
RWGENINO, VATERING AND PERIMETER 9LT FENCING W WIL STOCKPILE
L ?NO AFTER THIRTY (SD) DAYS NALL BE SEEOD AND MULCHED.
E) 0.{ NDNANCE PN HOn THE TRACKING, DROPPING OR DEFOREW OF Wis OR
AM' CHER MATERIAL ONTO CITY STREETS BY OR FROM ARY VEHICLE. AN
HNV EMT DEPOSITED MATERIAL WALL BE REW"aED FROM ME LNOWAY
uYEL FELT B/ THE CWIRALIOR.
9) A M:mMME«wnDls OF THE PWL GRADING AND OWEEDN CONTROL PAN AND
WHEN FOR TM OEVELOPMEM SMALL TE COMPILED 1NTN.
AL_ OIL" NOTIFICATION
CENTER OF COLORADO
1 800-922-1987
R 0303-232-1991 'oEUPWO
City of Fort Collins,
Colorado
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