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<br />4.4.2 ROARING RIVER
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<br />Flood of July 1957, The flood resulted from snowmelt and had an instantaneous peak of 19,000 cfs,
<br />No urban areas were affected by the flood, The principle items damaged by the 19!;7 flood were the
<br />agricultural lands and roads adjacent to, or over, the river, A few farm buildings were flooded, The total known
<br />damages in all categories in this reach amounted to slightly more than $45,000, A common type of damage
<br />from the 1957 flood was bank erosion, The slope of the stream ranges from 65 feet per mile above Basalt to
<br />40 feet per mile below Basalt Velocities probably in excess of 10 feet per second occurred during the 1957
<br />flood, The banks are composed largely of sand, gravel, and cobbles overlain by a comparatively thin mantle
<br />of soil, and are quite erosible, Spoil-type dikes, constructed by local interests with material bulldozed in the
<br />process of channel clearing, proved to be very erosible, More than one-half of the known damages in the 1957
<br />flood were caused to roads and bridges in the area, with nearly $24,000 of damages being caused to three
<br />bridges and have since been restored, A third bridge, Wllich was private, was completely destroYE,d and has
<br />not been replaced,
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<br />4.4.3 GUNNISON RIVER
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<br />Floods have occurred on the Gunnison River in: 1884, 1920, 1921, and 1957,
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<br />4.4.4 DOLORES RIVER
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<br />Floods have occurred on the Dolores River in 1884, 1909, 1911, and 1958.
<br />
<br />Flood of 1909, Flooding was the result of general rain in September.
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<br />Flood of 1911, Flooding was the result of general rain in October,
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<br />Flood of 1958, Snowmelt flooding on the Dolores River in April 1958 inundated 1,100 acres in the
<br />Gateway area and resulted in damage estimated at $230,000,
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<br />4,5 REFERENCES
<br />
<br />Department of Army, Albuquerque District, Corps of En9ineers, Flood Plain Information- Fountain & ,Jimmy
<br />Camp Creeks- Colorado Springs-Fountain-EI Paso County, Colorado, 1974,
<br />
<br />Colorado Flood
<br />Hydrology Manual
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<br />4.27
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<br />DRAFT
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