HomeMy WebLinkAboutDrainage Reports - 08/05/19880
MASTER DRAINAGE REPORT
COLLINDALE BUSINESS PARK
Collindale Business Park is located between Timberline Road on the east
and the union Pacific Railroad on the west. To the south is the Harmony
Half Acres subdivision and to the north is South Collins Tech Center.
There is a 3.2 acre residential site which is surrounded,on the south,
west and north by the Collindale Business Park. This 3.2 acre area is
included in my calculations. The total area of the site, including the
3.2 acres, is 59.9 acres.
There is an irrigation ditch running west to east across the property
at the high point. This ditch divides the drainage of the site to the
north and south. There are 18.3 acres draining south to the Chandler
sump, and 41.6 acres draining north to the proposed detention pond.
The portion draining to the Chandler sump is not to be developed at this
time and shall remain a pasture. Plans are pre ently under way_ to rovide
a satisfactory outlet from the Chandler sump. cyy�nis%r !Q� daes i�ea`ti�Ba8,5 `dtdee;���K
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stmale i c s�bese«feAiuq"y Ponds 7/1p srz e o.f
Drainage to the north will be from 41.6. acres, and wi�`1 go into a' each de Padi,v on��e
detention pond located at the northe st corner of property. The Fox
Meadows Basin report calls for shared detention pond with South Collinsa�dP ropose�
Tech Center. This detention pon 1 o have a volume of 8.53'acre feet IAp 1, uaness,
and an outlet of 24 c.f.s. hpo.yo.i
There is some offsite drainage from the red Sr r iY h«l. all
g golf course west of the rai I�roadsW S�,ea,„.
in a 24 inch steel pipe. The off —site flows are 1 c.f.s. for the 2 year n*pr vp"uYwYra"
storm and 9 c.f.s. for the 100 year storm per the Fox Meadows Report, based upon,
The attached sheet 4 shows the site and the proposed drainage routing.
Sheets 2 and 3 are drainage calculation sheets.
Phillip I. Robinson, P.E & L.S.
R0814s00
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COMPUTATION* STEWARTt'- GATES
Consulting Engineers arxi Surveyors
214 N. Howes St. Ft. Collins, CO 80521 (30.3) 482-9331
BY: El 9 Date 814402 Client: L<- 13 ill - 7-iley Sheet No. of 4-
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COMPUTATIONS STEWARTL,GATES
CopsultingEn3ineersand Surveyors
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