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<br />PAST FLOODS <br /> <br />Annual Peak <br /> <br />lIable ~ <br />DlsCharges- tor the2~lg Thompson <br />~...ar La Salle- <br /> <br />Rl~er <br /> <br />SUMMARY OF HISTORICAL FLOODS <br /> <br />Large flood discharges have occurred in the study reacr, <br />of the Slg Thonpson River. Tablos 3and 4 ShOW data collected at <br />the gaging stations operated by the U.S. Goological Survey located <br />at the ~uth of the canyon east of Drake and 4 miTes wast ot La <br />Salleon the8ig Thoi11psonRiver. <br /> <br /> O.M <br /> . <br />, Aug 1951 <br />9 '" 1957 <br />16 '" 1958 <br />, J", 1961 <br />18 J", 1965 <br />8 "" 1969 <br />27 '" 1971 <br />22 "1ay 1973 <br />1 "9 1976 <br /> <br />Slischarqe <br />(c.f.s.l <br /> <br />Annual Poak <br /> <br />"able3 <br />Dlscharge~ for the2~ig Thompson <br />Near Drak...... <br /> <br />River <br /> <br />6,100 <br />2,~60 <br />1,760 <br />2,050 <br />1,480 <br />2,480 <br />1,130 <br />1,280 <br />2,500 <br />11 Only those years having a peak discharge of 1,000 c.t.s. or <br />greater are indicated. <br /> <br /> Oete <br /> . <br />7 J,I 1906 <br /> . <br />1 S" 1938 <br />22 J" 1941 <br />7 J" 1942 <br />18 J,I 1945 <br />21 J" 1947 <br />, J" 1949 <br /> . <br />3 "9 1951 <br />9 M" 1957 <br />16 J" 1965 <br />" J,' 1976 <br /> <br />Dlscharqe <br />(c.t-s.l <br /> <br />6,000 <br /> <br />5,600 <br />4,690 <br />3,730 <br />7,600 <br />2,320 <br />3,330 <br /> <br />y <br /> <br />FromU.S.G.S.G.,gingStatlonon left bank 0.7 mile upstream <br />tromhlghwaybrldae,l.6mllesupstreamfromrrouthand4mlles <br />west of La Salle. <br /> <br />. <br /> <br />~t , co~tln"ov~ r~ord. <br /> <br />FLOOD RECORDS <br /> <br />3,530 <br />2,040 <br />2,220 <br />11,20a <br /> <br />TWQ U.S. GeologIcal Survey stream gagIng statIons on the <br />6ig Thompson RIver currently record discharge dat~ pertinent to the <br />study reach. Stream gages used In the study were described in <br />table 2. FlOOd accounts are available from local newspapers, the <br />Corps of Engineers, the Colorado Water ConservatTon Board, Weld <br />County, and the U.S. Geological Survey. <br /> <br />J! <br /> <br />Only those years having a pe~k discharge of 2,000 c.f.s. or <br />greater are Indicated. <br /> <br />y <br /> <br />From U.S.G.S. Gaging StatTon at mouth of canyon, 500 feet <br />upstream from Handy Oltch dlvers!on dam and 6 miles east of <br />Drake. ...+-,.... <br /> <br />. <br /> <br />Nbt a continuous record. <br /> <br />FLOOD DESCRIPTIONS <br />The fOllowing accounts (In:> reprosentatlvo of typlc(l1 <br />floods On the BIg T~pson River for which InformatIon Is available. <br /> <br />13 <br /> <br />" <br />