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FLOOD05049
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Last modified
1/25/2010 6:48:05 PM
Creation date
10/5/2006 1:13:09 AM
Metadata
Fields
Template:
Floodplain Documents
County
Larimer
Community
Larimer County
Stream Name
Cooper Slough
Basin
South Platte
Title
Cooper Slough within Larimer County
Date
11/1/1993
Prepared For
Larimer County
Prepared By
Love & Associates, Inc.
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />Flood Insurance Study Repo 1 Data <br />Flood Insurance Study - Cooper Slough, Larimer County, Colorado <br />Page 5 <br /> <br /> TABLE 1 <br /> PEAK DISCHARGES LEAVING THE <br />BOJeELDER CREEK BASIN AT 1-25 (cfs} <br />Location 1O-vr SO-yr .1 OO-vr SOO:Yr <br />Larimer-Weld Canal* 57 25B 258 258 <br />Vine Street 191 930 '1450 2430 <br />South of Vine Street 18 68 104 158 <br />C&S Railroad* 47 74 ~l4 132 <br />State Highway 14** 275 530 7:26 1136 <br /> <br />* <br /> <br />The canal and railroad flows go through underpasses at 1-25. <br />The flow to the 1-::'5 median has not been subtracted from these values (see <br />Table 2). <br /> <br />*" <br /> <br />Except at State Highway 14, the peak discharges listed above represent the <br />discharges from the BOlCelder Creek Watershed that flow into the Cooper Slough <br />Basin. At State Highway 14, the USBR determined the peal< fiow that leaves Soxelder <br />Creek basin at this location, but did not determine the amount of discharge that <br />travels down the 1-25 median and the discharge that overtops tile highway and flows <br />into the Cooper Slough tlasin. To determine this discharge into the Cooper Slough <br />Basin, the area of overtopping was surveyed to determine the distribution of flows. <br />A normal depth equation was used to determine ttle amount 01' discharge that flows <br />down the highway medis,n, and a weir equation was used to determine the amount <br />of discharge that overtopl; 1-25 into the Cooper Slou!~h basin. The following table lists <br />the results of this analysi s. <br />
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