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<br />,,-,uses. Pueblo Dam and Reservoir, the terminal storage facility, will
<br />be located on the Arkansas River about 6 miles west of the city of
<br />Pueblo at ,approximately the same site as the existing Barrier Dam.
<br />The ,reservoir 'will. include. 93,000 acre-feet of storage allocated to
<br />flood control. The Corps of Engineers will have the responsibility
<br />of prescribing regulations for the use,of the flood control storage, ,
<br />as specified under Section 7 of the 1944 Flood Control Act. ,About
<br />one-third of the Arkansas River Basin above Las Animas will be con-
<br />trolled by the Puebio Dam; however, storms occurring over the large
<br />uncontrolled drainage area below the dam could produce major floods
<br />at Pueblo and points downstream to John Martin Dam.
<br />
<br />14. A local protection project to protect Las Animas from Arkansas
<br />River floods was authorized by the 1965 Flood Control Act. The plan
<br />consists of 9.6 miles of levee on the right bank and one mile of levee
<br />on the left bank. Appurtenant works include levee protective measures;
<br />an interior drainage system consisting of outlet structures, a ditch.
<br />and ponding areas; ,a, sewage ,pumping plant; and intake structures for
<br />irrigation canals.
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<br />HYDROLOGIC DATA
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<br />15. D~INAGE BASIN FEATURES.- The Arkansas River originates in
<br />central Colorado. It flows in a southerly direction for about 60 miles
<br />to above Salida, Colo., and thence eastward to John Martin Dam. The
<br />total contributing drainage area above Pueblo damsite is 4,670 square
<br />miles. From the source to Salida, the Arkansas River traverses a valley
<br />bounded by high mountains with peaks ranging up to 14.000 feet above
<br />mean sea level.' In this reach, flows are produced by small perennial
<br />streams which originate on ,the high peaks. The larger of these are
<br />Cottonwood Creek, which enters near Buena Vista, and the South Arkansas
<br />River which enters near Salida. Between Salida and Canon City, the
<br />river entersade,ep,narrow,~,gorge. This gorge is about 55 miles long
<br />and contains the famous Royal Gorge with vertical walls as high as 1,000
<br />feet. There are four major tributaries in this reach. They are Badger
<br />Creek, Texas Creek. Grape Creek, and Currant Creek.
<br />
<br />16. At Canon City the Arkansas River emerges from the gorge and
<br />flows through a narrow valley to Pueblo. In this reach there are six
<br />major tributaries entering the river, Oil Creek, Beaver Creek, Turkey
<br />Creek, Hardscrabble Creek, Galbeth Creek, and Dry Creek. From Pueblo
<br />to John Martin Dam, the Arkansas River flows through a broad valley
<br />superimposed on the plains to a width of 5 miles in some locations.
<br />Within this reach 10 large tributaries enter the river. The South bank
<br />tributaries are St. Charles River, Huerfano River, Apishapa River, Timpas
<br />Creek, and Purgatoire River. The north bank tributaries are Fountain
<br />Creek, Chico Creek, Kramer Creek, Horse Creek, and Adobe Creek. The
<br />drainage area of the Arkansas River Basin above John Martin Dam is shown
<br />on prate 1.
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