HomeMy WebLinkAboutSite Certifications - 09/12/2001 (3)Mr. Basil Hamdan
City Of Fort Collins
Stormwater Utility Department
P.O. Box 580
Fort Collins, Co 80522-0580
Re: Fossil Creek Parkway Extension
Stormwater Certification
Project No. 0952-003
Dear Mr. Harridan:
August 27, 2001
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Please .find enclosed our Stormwater Drainage Certification for the Fossil Creek Parkway
Extension for the as -built condition as of August 24, 2001. TST, Inc. surveyed the above drainage
facilities on June 25 and July 3, 2001, as they were installed by the contractor. Included is a
redlined print of the storm sewer showing the as -built condition.
Please contact me at 226-0557 should you have any questions or require further information.
Sincerely,
TST,.IAIC. CONSULTING ENGINEERS
zz
Eric M. Fuhrman, P.E.
EMF
cc: Bob Campbell, Andover Development
Marc Palkowitsh, MSP Companies
Enclosures
TST, INC. 748 Whalers Way - Building D
Fort Collins, CO 80525
Consulting Engineers (970) 22641557
Aletru(303)595-9103
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DRAINAGE CERTIFICATION FORM
Please fill out all applicable items in this certification form
for single family, multi -family and commercial properties.
Write "OK" for items checked or actual number checked in field.
Use ON/All for items that are not applicable to the property that
is being certified.
A. Drainage facilities certification
1. Pond Certification
-volume verification ,/ a.25,4e-
a. topographic records and volume ✓
b. cross -sections and spot elevations ✓
-positive fall to pan
-side slopes
-invert elevation
-spillway elevation
-placement and size of riprap
-side slopes
-grading
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-orifice plate installation and size
-compaction of berm
-structural integrity of pond_
2. Swales
-location (are they within easement)
-dimensions and cross-section verification
-longitudinal slopes and side slopes
-spot elevations
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2 . Temoorary Measures : /FMZ .f 14MA"/ 40044te7W W 4eEF,r SiaF of A,,p
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-mulching 96e
-inlet filter installation ,4.*Mr r E7.YiFD. t .� O oWele s r
-check bale dams N/A
-seeding and temporary vegetation
-silt fence
D. Site Cleanup After Construction
-construction clean up
-smoothing of ruts
-reseeding
E. Statement of Compliance
This certification is signed and stamped and by signing this
form the engineer(s) attests that to the best=of his knowledge
the -as-built conditions of the drainage facilities are -as"",",
described in the above form and in the redlined plans enclosed.
Failure to properly disclose all known information -could
result in the rejection of this certification and prevent the
release of any Stormwater Utility holds on Building Permits
and/or Certificates of ,Occupancy.
F. Signature and Stamp by a Colorado Registered
Engineer.
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-permanent erosion control measures
(drop structures, riprap, etc....}
-tie-in to pipes, pans, curbs, etc....
-weir size (elevations, size, opening, etc...)
-available freeboard
-landscaping infringement on swales
3. Pibes
-size and type
-slopes (as -built and comparison to,minimum
0.4% slope)
-pipe capacity calculations if slopes are
significantly altered
-invert elevations
-installation and backfill material
-cover
encasement and clearance•from�other utility
lines close by
-joints
4. Concrete Pan Channels
-size
-slope
-super elevation
-cross-section
-thickness
-elevations
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S. Inlets
-size and type OK
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-size of opening (or name of standard used) %Ypx- R
.-grate elevation
-invert elevation OK
-box size jOK
6. Cross moans
-size
-type
-grade OK
-elevation OK
cross -sectional -depth OK
-tie-in to curb and gutter BK
7. Culverts
-size GK
-type 9-
-invert elevation OK
-headwalls
S. Underdrains
-size _1L
-type
-cover
-back€ill
-geotextiles
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-cleanouts
9. Curb cuts
-size
-tie in to swale, pipe, etc....
B. Certification of Grade Elevations Adjacent to
Drainage Facilities:
-minimum opening elevations
-top of foundation elevations
-comparison to,100 year WSEL's
(Freeboard requirements'and floodplein issues)
C. Certification of Erosion Control Measures:
1. Permanent Measures:
-Permanent vegetation (6" bare spots and weeds
under control)
-riprap
-riprap bedding
-drop sections
.-sediment basins/water quality ponds
-netting mats/blankets
-mulching