HomeMy WebLinkAboutLot Certifications - 11/04/1994 (7)• \bu,t,Lu0 I ~
STEWART&\.SSOCIATES
November 1, 1994
Mr. Glen Schlueter
Storm Water Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Glen:
Consultin3 E113ineers and Surveyors
-
Re: "As Built" Grading on Envelope X, Amendment to "The Pier," Fort
Co 11 ins, Co 1 or ado.
On the 28th of October, 1994, we shot spot elevations on Envelopes X and
Y and part of W lying south of the existing building. These spot elevations
are shown on the plan included wi th this letter.
The 10-plex on X is about completed, and the foundation on Y is in.
We found that the finished grading on Envelope X to be positive away from
the building. There is a drainage swale around the building. The high point
of the swale is 10 feet northwesterly from the northwest bui l ding corner.
Runoff from this point is in two directions: 1) runoff flows northeasterly
to the top of the existing walk; 2) runoff flows south then east around the
back of the building. The slope of this swale is about 2%. From the southeast
corner, also being the end of the swale, the water dumps onto Envelope Y with
no outlet. In order to use the existing grading on Envelope X, the developer
will be required to construct a 2 foot wide concrete pan around Envelope Y
and tie into the e xisting flow line at the parking lot. A 2.0 foot wide curb
chase will also be required to be constructed through the existing walk at
the parking lot location. This pan can also be use&,for runoff of Envelope
Y when it is final graded. These have been designed on the "as built plan."
In summary, the ex isting grading on Envelope Xis adequate to control
runoff in a positive manner. In order to cont i nue the runoff to the parking
area, a two foot concrete pan and curb chase are required. They should be
construceted this fall as to prevent water and snow build up south of Envelope
Y. I also inspected the gravel filter in the parking area and found that it
was in place and looked okay. This filter shou l d remain in place until all
the construction work and landscaping is in place on Envelope Y.
If you have any questions or need any further information please let me
know.
Sincere 1 y,
Franklin D. Blake, P.E. & L.S.
Secretary /Treas urer James H . Stewart and Assoc iates , Inc .
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enclosure
103 S. Meldrum Street
P.O . Bo x 429
Ft. Co llins, CO 80522
303/482-9331
Fax 303/482-9382