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FLOOD03858
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Last modified
1/25/2010 6:44:34 PM
Creation date
10/5/2006 12:08:42 AM
Metadata
Fields
Template:
Floodplain Documents
Designation Number
298
County
Boulder
Community
Unincorporated Boulder County
Stream Name
St. Vrain Creek
Basin
South Platte
Title
Floodplain Information Report - St. Vrain Creek, Boulder County, Colorado
Date
8/1/1988
Designation Date
5/1/1989
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />Table 3 lists the discharges and water ",ut'face elevations for the 10-, <br /> <br />SO-, 100-, and SOO-year flood events at selected reference points. <br /> <br />Flooded Areas <br /> <br />As indicated, the 100-year frequency flood hus heen selected hy the State <br /> <br />of Colorado as the flood event to be used [OT floodplain delineation and <br /> <br />regulation. Although the IOO-year event ~s llEled for regulatory purposes, <br /> <br />the SOO-year event has been delineated te' ~ llustrate the effect ",hen an <br /> <br />event exceeding the 100-year event does oc::\t:!' <br /> <br />Since the base map for the <br /> <br />flooded area plates is a two foot contour ~ap, the outlines of the other <br /> <br />flood events, 10-, 50-, and SOn-year, ea':] l:e readily plotted using the <br /> <br />information in Table 3. <br /> <br />The ,area delineated on the flooded area p~at "s as the 100-.year floodplain <br /> <br />meets the requirements of H. B. 1041 CIS aI: Hrea of State interest, <br /> <br />Upon <br /> <br />offielal approval of this report by the r,o]_orado Water Conservation Board 1 <br /> <br />the delineated IOO-year floodplain will he designated as a flood prone <br /> <br />area and therefore may be regulated in accordance with the County Zoni.ng <br /> <br />Resolution. <br /> <br />Flood Elevations <br /> <br />F:lood crest elevations for the 10-, 50-, I.OIJ.-, and SOD-year fl.ood event~; <br /> <br />may be found in four separate location!! -LD tllia report. <br /> <br />The Flood <br /> <br />Frequency, Elevation and Discharge Data l:able, Table 3, Jists th~SE~ <br /> <br />elevations at selected reference point!;. <br /> <br />'1'1"", flooded area man, P Lax" 1, <br /> <br />gives the p]an view of the flooded area on ;:1 contour base map and t-le hi.gh <br /> <br />L9 <br />
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