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<br /> <br />REPLY TO <br />ATTENflON OF <br /> <br />DEPARTMENT OF THE ARMY <br />U,S, ARMY ENGINEER DISTRICT, SACRAMENTO <br />CORPS OF ENGINEERS <br />1325 J STREET <br />SACRAMENTO, CALIFORNIA 958'4-2922 <br /> <br />January 6, 1998 <br /> <br />RECEIVED <br />JAN 0 II 1998 <br /> <br />Coil.:.:. <br />Conse'\ <br /> <br />I) <br /> <br />\/~ <br />~ ~ ~-? <br /><?~ ~~k;kt' <br />~ /OVl rJv LV"',' /-e- /p &/,./, <br />Dear Mr. Henson: J.. f? 1'1_/ ( SCl-(ir'''~''' /, f.. " <br />-io .u.t7~ '--{j. , 't t1 Y/ to!/ ,;v<-<-". e <br />I am writing in response to a November 12;-1997 letteJf~nt ~~ir.f$! <br />to you by Mr. Larry Lang of the Colorado Water Conservation Boardf~ d) <br />(CWCB). This letter pertains to an October field inspection and-lj~#7 <br />flood reconnaissance investigation performed by the CWCB on the ~ ~<<%' <br />lower Elk River near your home just above its confluence with thep~~~ ~ <br />Yampa River. The purpose of our letter is to provide comments on I~_/~~ <br />the CWCB letter and advise you and the Lower Elk River Flood v-~ /~ <br />Association of our responsibilities in accordance with the Clean ~ ~ <br />Water Act. ~ <br /> <br />~ ;tr; <br />~;"7' <br /> <br />" the June 1997 high flow is considered to be the flood p.S, .l.- <br />of record for this stream reach. The return period associated ~ ~~ <br />with the peak flow is more than a 100-year event, and is likely ) (.....,:_1'/-4- <br />to be in the range of a 200 -year event." l ~ 7- ~ <br /> <br />, , .)J ~lI.S. <br />Wh~le the June 1997 runoff was above average, we have coord~nated~AA./ . <br />with the U.S. Geological Survey (Mr. Rich Carver in Meeker and J ~;~ <br />Mr. Rick Crowfoot in Denver) and they are unable to confirm the e~ <br />above statement. According to their records, the stream gage ~~ <br />was operable and accurately estimated a gaged peak flow for the ' C~.~ <br />Elk River near Milner at 5,370 cfs on June 3, 1997. This flow ~ <br />corresponds to a 12-year flood event which equates to a 1 in 12 . <br />chance (12%) or risk of flooding at such volume in any given L <br />year. These findings are quite different than CWCB's "likely (;t/I'W? <br />200-year event" estimate. We believe it is important to put flow~ I I <br />events into the proper perspective when identifying floodplain ~ ~~1) <br />function and flooding problems to homes and infrastructure , <br />located within the floodplain. <br /> <br />Mr. Jerry Henson <br />Lower Elk River Flood Association <br />Post Office Box 774871 <br />Steamboat Springs, Colorado 80477 <br /> <br />Regulatory Branch (199775508) <br /> <br />Firstly, we do not understand the CWCB basis for the <br />following statement: <br /> <br />d) <br />