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FLOOD02227
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FLOOD02227
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Last modified
1/25/2010 6:23:48 PM
Creation date
10/4/2006 10:42:37 PM
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Template:
Floodplain Documents
County
Jefferson
Basin
South Platte
Title
Cedar Creek Basin
Date
8/29/2000
Prepared For
CWCB
Floodplain - Doc Type
Flood Mitigation/Flood Warning/Watershed Restoration
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<br />AUG-29-2000 TUE 10:04 AM <br /> <br />FAX NO, <br /> <br />p, 06 <br /> <br />Springs Pond. [There Is a potential for overtopping and failure of the pond embankment as <br /> <br /> <br />occurred for several small ponds in the High Meadow burned area. Failure of Cedar Springs <br /> <br />Pond embankment could exacerbate downstream flooding. A subsequent visit is planned.] High" <br /> <br />water marks In the Cedar Creek at Cedar Cove channel probably associated with the spring 1999 <br /> <br />rainsform (4/28-30/99) indicated a peak discharge of about 800 cfs. <br /> <br />[Note, the stream-gaging station for the North Fork Big Thompson River at Drake is located <br /> <br />about 1 mile downstream from Bobcat Gulch. The peak discharge on August 16, 2000, was xxx <br /> <br />cfs (as I recall -150 cfs - getting Qp and time of peak). Tom, this paragraph needs a little <br /> <br />help; gage will provide valuable info on time to peak (being after 7 days, it takes more time to <br /> <br />access the data; we need to get data for other downstream gages on the Big Thompson to assess <br /> <br />traveltime and peak flow attenuation.] <br /> <br />Peak discharges in streams draining the 2000 Bobcat wildfire area were compared with peak <br /> <br /> <br />( /J discharges In the Buffalo Creek basin, which had a wildfire in 1996, resulting from numerous <br /> <br />t,y, <br />"? rainstorms (figure 4). The Bobcat burn did not burn uniformly, but rather was a mosaic of <br /> <br />severely to unburned areas. Flood runoff is similar for the Buffalo Creek and Bocat burned <br /> <br />areas that had similar rainfall amounts/durations (figure 4). Rainfall runoff data from the <br /> <br />2000 High Meadow, Colorado, and Cerra Grande, Los Alamos, burned areas also is similar to <br /> <br />Bobcat flooding, but not shown. <br /> <br />SUMMARY <br /> <br />The Bobcat fire affected the watershed differently than the 1996 Buffalo Creek wildfire, the <br /> <br />rainfall runoff relations may be different, particularly in terms of nalural watershed recovery <br /> <br />5 <br />
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