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<br />SEITIIIFIVE <br /> <br />Rio Blanco Countv <br /> <br />Data was collected at two locations on the White River: one upstream of Yellow Creek and <br />Piceance Creek (Figure 5.2-3) and one downstream (Figure 5.2-4). Figures 5.2-3 and 5.2-4 <br />illustrate that during these storm events the White River was flowing below normal, which <br />shows that these storm events did not cause significant flooding on the White River. <br /> <br />Figure 5.2-5 <br />Daily Discharge for Yellow Creek Near White River, Colorado <br />March through December, 2001 <br /> <br />CI <br />z: <br />CI 7 <br />u <br />~ 6 <br /> <br />ffi 5 <br />Q.. <br />~ 4 <br />LL.J <br />LL.. <br />U 3 <br />1--1 <br />Q:I <br />:. <br />u <br />~ 2 <br />c.,:I <br />c.:: <br />c:c <br />::c <br />u <br />C/",I <br />1--1 <br />CI <br /> <br />~ 1 <br />~ Har 01 Rpr 01 Hay 01 Jun 01 Ju1 01 Rug 01 Sep 01 Oet 01 No... 01 Dee 01 <br />CI <br />DRTES: 02/15/2001 to 12/13/2001 <br /> <br />USGS 09306255 YELLO~ CREEK NERR ~HITE RIVER1 CO. <br /> <br /> <br />EXPLRNRTION <br />--- DRILY HERN DISCHRRGE <br /> <br />--- HEDIRN DRILY STRERHFLO~ BRSED ON 21 YERRS OF RECORD <br />X HERSURED DISCHRRGE <br /> <br />The discharge of Yellow Creek near the White River is shown in Figure 5.2-5. This figure <br />reveals that Yellow Creek was flowing above average during the storm events, however, not at <br />peak flood stage. <br /> <br />Figures 5.2-2, 5.2-3, 5.2-4, and 5.2-5 compare the daily mean discharge during the major rainfall <br />events under investigation and the median daily streamflow based on several years of data. <br />[Note for black and white copies: In Figures 5.2-2, 5.2-3, and 5.2-4 the daily mean discharge <br />data series are generally beneath the streamflow data series that are based on the several years of <br />record. In Figure 5.2-5 the daily mean discharge data series is generally above the streamflow <br />data series that is based on the 21 years of record.] <br /> <br />A frequency analysis of the data using the USGS software PEAKFQ indicates that, based on the <br />yearly peak discharges for the periods of record (from 17 to 38 years), the events were <br />approximately on the order of 1.5-year events, suggesting that the localized precipitation events <br />did not significantly affect the surrounding rivers and streams. <br /> <br />5.3 EXTENT OF FLOODING <br /> <br />The following flood information was obtained from Mr. Jeff Devere, Rio Blanco County. <br /> <br />URS <br /> <br />T:\PROJ ECTS\6844888 _ CWCB _FLOOD_DOC _RPTS\SUB _00\6.0 _PROJ_DELlV\REPORT\FI NAL REPORT .2. D0020-MAR-021 \ 5 - 9 <br />