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<br />Colorado Flood Hazard Mitigation Plan -1999
<br />
<br />in Weld and Logan counties and oyer the Schaefer
<br />Draw Basin in Morgan County north 01 Weldona. Flood-
<br />waters from Schaefer Draw entered the unincorporated
<br />Town 01 Weldona on the evening of July 29 while sim~
<br />lar damaging floodwaters from Pawnee Creek entered
<br />the unincorporated Town 01 Atwood ea~y July 30th
<br />(west of Ste~ing and north of U,S, Hwy 6), Addrtionally,
<br />floodwaters flowing east from Atwood entered the City
<br />of Ste~ing,
<br />
<br />During the Presidential Declaration Incident Period
<br />(July 28 - August 12, 1997) stonn systems drenched
<br />other areas in northeastern Colorado, as well as sev-
<br />eral counties in southeastern Colorado. In addrtion, the
<br />Denver Metro Area received flooding rains as did the
<br />Clear Creek County area to the west of Denver.
<br />
<br />Larimer, Logan, Weld, Morgan, and Clear Creek coun-
<br />ties have drainage tributaries to the South Platte River,
<br />In addition, portions of Elbert and Uncoln counties have
<br />tributaries to the South Platte River. The river basin has
<br />a drainage area of about 24,300 square miles and is
<br />located in three states: Colorado (79 percent of the ba-
<br />sin); Nebraska (15 percent 01 the basin); and Wyoming
<br />(6 percent 01 the basin),
<br />
<br />The basin has a continental climate modified by topog-
<br />raphy, in which there are large temperature ranges and
<br />irregular seasonal and annual preciprtation. Mean tem-
<br />peratures increase from west to east and on the plains
<br />from north to south, Areas along the Continental Divide
<br />average 30 inches or more of precipitation annually,
<br />which Includes snowfall in excess of 300 inches, In con-
<br />
<br />. 22 Most Damaging Floods in Colorado
<br />
<br />Date Major Stream or Location Deaths Damages
<br />(In 1999 $)
<br />May 1864 Cherry Creek ,It Denver 7 $ 8,000,000
<br />July 1896 Bear Creek at Morrtson 27 6,000,000
<br />OcL 1911 San Juan Rlver near Pagan Springs 2 6,000,000
<br />July 1912 Cherry Creek at Denver 2 120,000,000
<br />June 1921 Arkan... River at PuebSo 78 760,000,000
<br />May 1836 Monument Creek at Colorado Sprtngs 18 62,000,000
<br />May 1936 Kiowa Creek ne.r Kiowa 9 15,000,000
<br />May 1942 South Platte River Balin 7 8,500,000
<br />May 1955 purg_torte River at Trinidad 2 38,000,000
<br />June 1957 Western Colorildo 7 18,000,000
<br />June 1965 South Platte River .t Denver 8 2,200,000,000
<br />June 1965 Arkans.s River Basin 16 205,480,000
<br />May 1969 South Platte RIver Sasln 0 21,500,000
<br />SepL 1970 Southwest Colorado 0 13,200,000
<br />May 1973 South Platte River at Denver 10 388,800,000
<br />July 1976 Big Thompson River In Larimer County 144 85,200,000
<br />July 1982 F.an River at Eitel Park 3 49,080,000
<br />June 1983 North Central Counties 10 26,250,000
<br />May-June 1984 Western and Northwestern Counties 2 46,500,000
<br />May-June 1993 Western Slope 0 2,140,000
<br />July 1997 Fort Collins & 13 Eastern Counties 6 169,367,000
<br />May-June 1999 Colorado Springs & 12 Eastern Counties 0 100,000,000 (est.)
<br /> TOTALS 352 $ 4,486,577,000
<br />Source: CWCB and Colorado OEM Figure 2.4
<br /> Chapter 2 - 5 111.00 5:3J PM
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