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<br />. }.... <br /> <br />. <br /> <br />. <br /> <br />'J:""'C'.~" <br />"z ~ OJ i <br /> <br />River drainage. The project would furnish storage for irrigation, mu- <br />nicipal and industrial water supply and flood control in addition to <br />providing a valuable recreation facility. Storage allocations include <br />264,000 acre-feet of conservation storage of which 30,000 acre-feet is <br />dead and inactive storage, and 93,000 acre-feet of flood control storage. <br /> <br />EXISTING AND AUTHORIZED IMPROVEMENTS <br /> <br />4. EXISTING FLOOD PROTECTIVE fIORKS,- John ~lartin D3!" was the <br />first improvement bui 1 t by the Corps of Engineers, - for-the deve lopment <br />of the water resource~ of the Arkansas River Basin in Colorado. The <br />project was completed and placed in operation in 1948, It has the <br />largest storage capacity of any reservoir in the State. -Ihe d~_~Mhich <br />is a concrete gravity overflow structure flanked py earth_~~IKei~Rans <br />_ __. _ __ . _. _ _ _ _ ___n _ _ _ <br />the Arkansas~ River about 58 miles upstream from the Colorado-Kansas <br />State line and about 18 miles below Las Animas. The reservoir extends <br />14.8 miles up the valley and covers about 17,881 acres at maximum pool <br />level. The total reservoir stora?e capacity at maximum pool elevation <br />is 631,121 acre-feet, based on estimated sediment depletion since the <br />latest survey in 1966. About 267,177 acre-fcet of this capacity is <br />reserved for flood control and the remaining 303,945 acre-feet is <br />utilized for storage of irrigation water and recreation. The water <br />stored in the reservoir for irrigation purposes is released in accord- <br />ance with the terms of the Arkansas River Compact and at the request of <br />the Administration. <br /> <br />,> <br /> <br />5, Other improvements constructed by the Corps of Engineers in the <br />Arkansas River Basin include the Templeton Gap Floodway at Colorado <br />Springs, the Pueblo FIoodway Levee Extension at Pueblo, and the Pinon <br />Canyon Dam at Trinidad. All of these improvements were constructed as <br />single-purpose flood control projects. The Templeton Gap FIoodway pro- <br />- - - - - - - -tects- an-urban- 'area- in-~the-northeas~t-sect-ion-of -Colorado-Spr-ings-from- - ~ <br />runoff which originates on a bowl-shaped drainage area of about 8 square <br />miles and concentrates in the main channel of Templeton Gap where the <br />rapid fall produces high velocities. The floodway, which was completed <br />in 1948, intercepts and diverts these flows via a channel to ~lonurnent <br />Creek, a tributary to Fountain Creek. The Pueblo Floodway Levee Ex- <br />tension is an addition to the lower end of the Pueblo Floodway which <br />was constructed by local interests on the Arkansas River through the <br />city of Pueblo shortly after the disastrous flood of 1921, The purpose <br />of the extension is to prevent inundation of an urban area of important <br />industrial and transportation facilities hy backwater from floods on <br />the Arkansas River. The Pinon Canyon Dam, which was completed in 1954, <br />protects a highly developed urban area of about 40 acres in the north- <br />western and central sections of Trinidad from floods originating on the <br />precipitous Pinon Canyon Arroyo. The drainage area of the watershed is <br />about 1.4 square miles. The project consists of an earth dam which <br />creates a reservoir with a storage capacity of 406 acre-feet, <br /> <br />; <br /> <br />.~ <br /> <br />2 <br />