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<br />
<br /> PEAK FLOWS OF HISTORICAL FLOODS
<br /> Gunnison River
<br />Year Near Grand Junction Galle Date Near Lazear Galle Date
<br />1905 27,400 Jun 9
<br />1920 35,700 May 23
<br />1921 30,100 Jun 15
<br />1941 27,500 May 14
<br />1957 27,800 Jun 6
<br />1969 12,000 Apr 24 10,100 Apr 24
<br />1970 11,500 Jun 29 11,000 Jun 29
<br />1973 12,000 May 19 9,800 Jun 15
<br /> Uncompahgre River
<br />Year Colon a Galle Date Della Galle Dale
<br />1921 5,140' Jun 13-14 3
<br />1927 3,400 Jun 28 2,880 Jun 29
<br />1938 3,390 Jun 22 3
<br />1941 3 3,730 May 5
<br />1944 3 3,340 May 16
<br />1947 3 3,500 Oct 15
<br />1957 3,300 Jun 29 3
<br />1975 3,360 Jul4 3
<br />lGage not in operation.
<br />2Estimated. Mean daily flow, 4,080 cfs.
<br />JFlow not outstanding.
<br />
<br />irrigation diversion structures and other river-
<br />ine improvements, Inundation of agricultural
<br />areas has eroded the land; damaged or
<br />destroyed crops; damaged irrigation systems
<br />and other farm improvements; reduced crop
<br />yields due to increased salinity of soil; and
<br />deposited sand, silt, and debris on cropland,
<br />livestock have had to be protected by moving
<br />them to high ground. Major floods have
<br />required evacuation of homes and resulted in
<br />damaged or destroyed public utility facilities,
<br />roads and road bridges, and railroad track and
<br />railroad bridges, The costs of recovery from
<br />floods have been substa~tial.
<br />
<br />Streamflow in the Gunnison River basin is
<br />regulated by Taylor Park, Blue Mesa, Morrow
<br />Point, Crystal, and Paonia Reservoirs, which
<br />aggregate 1,208,800 acre-feet of multiple-
<br />purpose storage. Ridgway Reservoir, a Water
<br />and Power Resources Service improvement on
<br />the Uncompahgre River just upstream from
<br />Cow Creek, is scheduled for completion in
<br />1984. Its operation on the basis of snowmelt
<br />forecasts would afford minimal flood control
<br />benefit. Streamflow in both the Gunnison and
<br />Uncompahgre basins is also influenced by
<br />irrigation diversions,
<br />
<br />4
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