HomeMy WebLinkAboutSite Certifications - 06/06/1990M
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June 6, 1990
Mr, Glen Schlueter
Storrhwater 'Utility
City of Fort Collins
P.O. Box 580
For Collins, CO 80522 i
Re Soundtrack at Arbor Plaza Project No.: 891.1
As -Built Certification
Dear Glen:
This letter serves as final certification for stormwater improvements constructed at the
Soundtrack site. This letter is ,based upon a visual inspection of the site by myself and spot
elevations and dimensions by survey crew. The following observations can be made:
Storm sewer, 'inlets and discharge structure have been constructed in substantial
conformance to the lines and grades shown on the approved plans. An
additional area inlet has-been added on the 16' storm sewer stubout to the west.
This inlet will not adversely affect the operation of the storm sewer and could
prove beneficial to the future occupant of the pad to the west. The discharge
structure above Mail Creek conforms to the plans and operates as intended.
2. Parking lot grades vary slightly from the plan grades; the resulting slopes are
within acceptable limits and the parking lot will drain as intended..
3. Erosion control measures have been installed in accordance with the plans.
Future maintenance may be necessary to insure continued operation.
4. The site grading was checked on the east and north sides of the building. The
Intended swale on the east was constructed satisfactorily; the swale on the north
was not graded as per the plans. Due to the lack of this swale the north portion
of the roof and some additional landscaping will drain to the right-of-way of
.Harmony Road. The attached calculations were performed to determine the
amount of additional runoff entering the right-of-way, and if this flow exceeded
allowable gutter capacities in Harmony and College. The additional runoff is -
minor, 0,23 CFS for the 1 0-year/storm and 0:45 CFS for the 100-year storm,
above the planned flowrates. Flows originating in Harmony and College were
calculated, and gutter capacity was checked at the PCR ,point in Harmony and
in College at the south line of" the Soundtrack site.. Both locations can
accommodate the 100-year flows within 10-year inundation criteria. Based on
the attached analysis, we do not perceive a problem with the site grading as
Is, and recommend acceptance by the City.
ENGINEERING PROFESSIONALS INC.
2000 Vermont Dr., Fort Collins, CO 80525 (303) 226-3852
Plaza of the Rockies, Ill South Tejon, Suite 300, Colorado Springs, Colorado 80903 (303) 634-5006
In summary, the grading and drainage improvements for the Soundtrack P.U.D. have
been constructed in substantial conformance with. the approved drawings and drainage report.
Attached for your use is a set of the record drawings; mylar sepias of the same have been
submitted to Engineering for their files. Any questions, please call.
Sincerely,
ENGINEERING PROFESSIONALS, INC.
Robert Schildgen, P.E.
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