HomeMy WebLinkAboutSite Certifications - 08/14/2005Mr. Basil Hamden
City of Fort Collins
Stormwater Utility Department
P.O. Box 580
Fort Collins, CO 80522-0580
Re: Senior Center
Project No. 10-041-205
Dear Basil:
cexll � �`") August 3, 1995
C
V14�5
We have completed the Storm Drainage Certification for the (Fort -Collins -Senior -Center,.
Enclosed please find the following back-up data:
1. Sheet 4, 9, and 10 of 12 of the construction drawings with appropriate as -built
information shown.
2. Survey field notes of as -built conditions.
3. Drainage Certification Form with applicable items checked and the form signed
and stamped.
If you should need any additional information, please feel free to contact me at any time.
Respectfully,
TST, INC. CONSULTING ENGINEERS
chard A. Dvorak
RAD/lg
Enclosures
At,veHu n P.E.
TSTINC. 748 Whalers Way - Building D 102 Inverness Terrace East
! Fort Collins, CO 80525 Suite 105
Consulting Engineers (303) 226-0557 Englewood, CO 80112
Metro Denver (303) 595-9103 (303) 792-0557
Fax (303) 226-0204 Fax (303) 792-9489
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 "N/A" for items that are not applicable to the property that is being certified.
A. Drainage Facilities Certification
1. Pond Certification
Volume Verification 04
a. Topographic records and volume O/c
b. Cross -sections and spot elevations 1QALS1e P/W,9
Positive Fall to Pan ✓
Side Slopes
Invert Elevation
Spillway Elevation
Placement and Size of Riprap.
Side Slopes
Grading
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
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. Pipes
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
5. Inlets
Size and Type
Size of Opening (or name of standard used)
Grate Elevation
Invert Elevation S v
Box Size v
6. Cross Pans
Size
Type
Grade
Elevation
Cross -sectional Depth
Tie-in to Curb and Gutter Al A
B.
C.
7. Culverts
Size
Type
N a
Invert Elevation
ti A
Headwalls
AILIJ
8. Underdrains
Size
Type
Cover
Backfill .
✓ /�
Geotextiles
Cleanouts
�' b
9. Curb Cuts
Size
Age -
Tie in to Swale, Pipe, etc...
A) 1A
Certification of Grade Elevations Adjacent to Drainage Facilities
Minimum Opening Elevations
Top of Foundation Elevations
Comparison to 100 Year WSEL's
ti Aa
(Freeboard requirements and floodplain issues)
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
2. Temporary Measures
Mulching 4L
Inlet Filter Installation
Check Bale Dams = 7—
Seeding 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 know information could result in the rejection of this
certification and prevent the release of any Stormwater Utility holds on Building Permits
and/or Certificate of Occupancy.
F. Signature and Stamp by a Colorado Registered Professional Engineer