HomeMy WebLinkAboutLot Certifications - 10/26/1992 (3)CERTIFICATION OF STORM DRAINAGE IMPROVEMENTS
FOR
CLARENDON HILLS SUBDIVISION — FOURTH FILING
This LETTER OF CERTIFICATION is provided by the undersigned
Registered Professional Engineer to establish that the storm
drainage improvements contained within the Fourth Filing of
Clarendon Hills have been completed in compliance with the
project plans and specifications.
Further it is certified that the improvements will function
properly during minor and major storm events as required by the
City of Fort Collins and by the Final Storm Drainage Report
prepared by the undersigned. The 100 year design storm will be
passed through the storm drainage system as now .constructed with
negligible chance of any damage to property or persons resulting.
It is recommended that this certification allow for Engineering
Releases to be granted relative) o storm drainage requirements so
that building permits can be issued by the City of Fort Collins
for all lots.
This CERTIFICATION is provided this 26th day of October, 1992.
Dennis L. Donovan, P.E.
Land Development Services
309 W. Harmony Road — Unit A
Fort Collins, Colorado 80526
OVERALL GRADING &
DRAINAGE PLAN
CLARENDON HILLS FOURTH FILING
TABLE 1
HYDROLOGIC CIHARACTERISTICS AND ESTIMATE OR STORM WATER RUNOFF
FROM SUB -BASINS IN DRAINAGE BASIN e - DEVELOPED CONDITION.
<IB-BASIN C-VALUE AINRA LENGTH DELTA SLOPE TC2 TCIOO 12 1100 O2 01L. L.P.
lee) (it) Ift) (Z) (miTO Info) ( /n ) (,fF) ti.)
1 0.9 0.36 360 9 2.9 10.0 l0 n 5 7.2 0.8 1.11
2 0.4 0.51 820 923 2.8 26.3 13.9 2.0 fi 2 0.1 L 5
3 0.4 0 �36 350 16 2.6 26 0 22.8 1.6 4.9 1
4 0.B5 0 .96 600 16 3.5 15.1 117.06 2.57 7.0 0.8 2 7. e
5 0.4 0.82 600 21 3.0 ILL 10.6 ' 1 7.0 1.1 2 -
6 0 4 0.01 360 IB 2.5 13.3 19 I 16 5.3 Il.fi
162 0 59 1 .29 360 9 3.5 13 3 10.0 2.26 7 1.2 4 Voi
A /
1,1-4 0.50 4.52 820 25 3.8 10.5 18.1 5 7.2 3.1
t 4 0.58 4. 52 fl20 23 2.8 22.8 18.1 1.7 5.4 3.fl I1 5 0.50 6.22 620 23 2.8 22.8 18.1 l 7 5 4 5.fi 1L 5 0.50 5 22 820 23 2.8 22 8 I8J L 7 5< 4.l 2off-site 0.25 N-"-] 940 12 1.3 LL ] 41.5 I 1 3 4If-site E
l-6 O/n IA.L9 940 12 1.1 18.9 34.1 1.2 3.8 fi. ��1N F
assesse'
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NEW DRIVEWAY APPPOACH DETAILS
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OVERALL UTILITY PLAN
IT`E OVERALL UTILITY PLAN T "°
OVERALL GRAD & DRNG PLAN 4 14