HomeMy WebLinkAboutLot Certifications - 12/19/1996 (4)FFM
PARK ENGINEERING
CONSULTANTS
IZI�°1 I��a
December 17, 1996 J�
O
Mr. Basil Hamdan
City of Fort Collins
Stormwater Utility
235 Mathews Street
Fort Collins, Colorado 80522
RE: -iNeenant@, . FiceiBu Jinn-ONPDrainage Certification
Dear Basil:
Si ,RMWATER
RECEIVED
DES 18 MS
Enclosed is a completed Drainage Certification Form and a red -lined print of the
Drainage and Erosion Control Plan for the referenced facility.
We have completed an as -built survey and inspection of this project and find that it has
been completed in substantial compliance with the approved Plans prepared by us.
If you have any questions, please call.
Respec y in" ed
Donald W. Park, P.E.
cc: Mike Stajduhar, Neenan Company
file 10736001.doc
1240 Main Street Longmont, CO 80501 (303) 651-6626 FAX (303) 651-0331
•'Y
1
DRAINAGZ CNI(•1'IFICA ION FORM
Please fill out all applicable items in this certification form
for single family, mn1.r_i•-family and commercial properties.
Write 'WOK" 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
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
-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
JAM-24-96 WED 13:58
M
-permanent erosion control measures o�C'
(drop structures, riprap, Pr.r....}
-tie--in to pipes, ,pans, curbs. etc....
-weir size (alpvations, site, opening, etc....) -
available freeboard
landscaping infringement on swales j2&
-size and type Oe
-slopes (as -built and comparison to minimum
0.4% slope)
-pipe capacity calculations if slopes are
significantly altered r-
-lttvei'l, g1GVd�lUtld 3�.
-installation and backriii manorial l2�
-cover
-wnnasPment', and cl.eara.nce from other utility
lines close by �=
-joints Q�
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
-box size
6. Cross pansle?" Aer0141_
-size
-type
-grade_
-elevation
-cross-sectional depth
-tie-in to curb and gutter
7, Culverts
-size �Q-
-type
-invert elevation "A
-headwalls'
B. Underdrains
-size
-type
-cover
-backfill-
-geotextiles
Jf11R GY VV n"V "'.
-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 W3DL's
(Freeboard requirements and floodplain issues)
c. Certification of Erosion Control Measures:
1. Permanent Measures;
-Permanent vegetation (61, bare spots and weeds
under control) 11C ,rw�wd' J/"''�� 1??7
-riprap
-
riprap bedding
-drop sections u�
-sediment basins/water quality ponds
-netting mats/blanketsAA
-mulching
2. Temporary MeasuYes:
AelAL
-mulching
-inlet filter installation
-
-check bale dams-
-seedin d temporary vegetation AZ d0
JeaaG«a � .r�i�•� /997
-silt fence
D. Site Cleanup After Construction
-construction clean up
-smoothing of ruts
-reseeding T dam/ f�"�f /1 ?7 -
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 ]mown information could
result in the rejection of this certification.and prevent.the
relcace of any Stormwater Utility holds on Building Permits
and/or certificates of Occupancy.
F. signature and Stamp by a Colorado Regi
Engineer.
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1\ PAVEMENT
s NOTES:
T ALL PANS TO BE SPILL UNLESS OTHERWISE NORD.
I0\ AC. 2. THE BASE FLOW ELEVATION FOR THIS SIZE VARIES BETWEEN
4899.0 TO 49W.8.
\FU111RE �i / V., (' ACCESS AND L 3 BASE FLOW ELEVATION LINES SHOWN HEREON M
PARKING 1 r�Per FROM FEMA FIRM PANEL N0. 080102 W12 C.
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MENT f11 _ i` S I N Tip, T�
6N9Y wnLR µp� _ 4A,• -J; BASIN B 1 ' J ( DRAINAGE SUMMARY TABLE
\BA A = 1.42 AC. ---- --
j BASIN AREA COEFF. OIOD O1IX10
q' BASIN A 2.P ACoe) Te all Al as
O YR 1'L 4
ILEVA ,Isoz.a2 LOT ,� 1 Nva� BASIN wnc 0e1 ee as ml as
BASIN C 078 AC 0a lam 65 az
A 5 COO
— I 1YII Lopes % 1 yi. ul- 1 1.IIIna.'al. BASIN TWAT 0.22 rl as 2.2 a.
BASIN 115 AC Dee 30 as ee os
AA NEENAN OFFICE E,/, ✓ %/ � BASIN 372 AC ore pees 55a3
BUILDING II Iw
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' F.F. 4902.00 E VADON > ` /. Dtl.. ' ��•� BASING 1.27 AC 0.25 2.5 a5 11 O'S
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FDIVIDE J' OPEHIM ��tMl CTS / T /'V// .0. owd
A ' BASIN EST 0.64 Ac on 2 T m AA CF
OIL�.!- — ': -••• BASIN 052 o.an¢ ovv z6 at
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- 7 _ ,tee LASTIHC SANOTARY sslaH RENSED: 4 10 96 5 10 96' 6 10 96 /z 179
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WEEK
30_ 617J' - - HOLE PARK ENGINEERING
fu�SM4 SANITARY YKH u
OSED SANITARY SEAT" CONSULTANTS
- ENSTIM RATER 1,RE
PI 1)11 RATE HYDRANTR 12w MAIN STREET
LONC,AONi CO. 80501 (2303)651-662E
TASTING ATEN V LN
`I PFI�RoINE
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GRADING AND DRAINAGE PLAN
= PRI SILT FENCE
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