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FLOOD00385
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Last modified
11/23/2009 1:21:52 PM
Creation date
10/4/2006 9:15:03 PM
Metadata
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Template:
Floodplain Documents
County
Boulder
Community
Boulder
Stream Name
Boulder Creek
Title
South Boulder Creek Interim Hydrology Study
Date
7/1/2000
Prepared For
Boulder County
Prepared By
Taggart Engineering Associates, Inc.
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />1- 10 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I I <br />I I <br /> <br />At the lower end of the watershed the model shows flow discharging at four <br />locations. The main flow in South Boulder Creek joins with Boulder Creek at the <br />historic confluence. At Foothills and the Wellman Ditch, spills to Bear Canyon <br />Creek occur. On the west side of 55th downstream of Arapahoe some overflow <br />from the Wellman traverses through an industrial/commercial area directly to <br />Boulder Creek. Also, flow leaves South Boulder Creek just downstream of <br />Arapahoe through overflows to Valmont. <br /> <br />The model does not depict flow leaving the watershed by following numerous other <br />irrigation ditches and spills to Baseline reservoir, which can occur. The Wellman <br />diversion is treated differently, per sponsors' direction, because its embankment <br />physically crosses the main floodplain, and backs up and redistributes flood waters. <br />The diversion to Valmont would immediately overflow to Boulder Creek and reflects <br />overflow of the headworks. <br />
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