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Last modified
1/29/2010 10:12:00 AM
Creation date
10/5/2006 2:44:09 AM
Metadata
Fields
Template:
Floodplain Documents
County
Otero
Pueblo
Community
Otero, Pueblo Counties
Stream Name
Arkansas River
Basin
Arkansas
Title
Arkansas River Channel Capacity and Riparian Habitat Planning Study
Date
8/1/2001
Prepared For
CWCB
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Project
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />ARKANSAS RIVER FROM OTERO/PUEBLO COUNTY LINE <br />TO JOHN MARTIN RESERVOIR <br />CHANNEL CAPACITY AND RIPARIAN HABITAT PLANNING STUDY <br /> <br />2. GENERAL BACKGROUND AND SETTING <br /> <br />2.1 JOHN MARTIN RESERVOIR PROJECT <br /> <br />John Martin Dam is located on the Arkansas River in Bent County, Colorado, near the <br />villages of Hasty and Caddoa. John Martin Dam is 58 river-miles upstream from the Colorado- <br />Kansas state line and is approximately 39.4 river-miles downstream from La Junta and <br />approximately 17.9 river-miles downstream from Las Animas. <br /> <br />The Caddoa Dam and Reservoir Project, renamed in June 1940 to John Martin Dam and <br />Reservoir Project, was authorized by Congress in the Flood Control Act of 1936 (Public Law 74- <br />738) as amended by the Flood Control Act of 1938 (Public Law 75-761)(USACE 1947:1). The <br />legislation authorized John Martin Dam and Reservoir to be operated for flood control and <br />conservation storage of irrigation supply. The Flood Control Act of 1965 (Public Law 89-298) <br />further authorized the establishment of a permanent pool not to exceed 10,000 acre-feet for fish <br />and wildlife and recreational purposes. <br /> <br />Construction at the John Martin Project began in 1939 with the relocation of approximately <br />20 miles of the Atchison, Topeka, and Santa Fe Railway tracks (US ACE 1948:5), today known <br />as the Burlington Northern and Santa Fe Railway. Construction work on the dam began in <br />August, 1940, but work was suspended in the spring of 1943 due to World War 11 (USACE <br />1943:23). However, water diversion through the sluicing conduits of the concrete dam began on <br />November 30, 1941, and storage in the reservoir was initiated in December 1942. Management <br />of river flows and operation of the reservoir officially began on March 11, 1943 (US ACE <br />1943:25, 1948:3-4, 1999:2). Construction resumed in the spring of 1946 and the project was <br />completed in October 1948. <br /> <br />At 3870 feet, maximum water surface elevation (top of flood control pool), the reservoir is <br />14.8 miles long with an average width of about 1.9 miles, the surface area is 17,151 acres and <br />storage capacity is 605,115 acre-feet. Storage capacity at the top of the conservation pool <br />(elevation 3,851 feet) is approximately 335,693 acre-feet (USACE 1983a:2-2; 1999:2). <br /> <br />The majority of the water that reaches John Martin Reservoir is derived from snowmelt <br />and rain that originates in the mountainous upper portion of the Arkansas River drainage basin. <br />Upon leaving the mountains, this moisture flows via the Arkansas River and it's two primary <br />tributaries, Fountain Creek and the Purgatoire River to John Martin Reservoir. Other flows that <br />travel via the Arkansas River channel through the study area to John Martin Reservoir include <br />flows such as transmountain diversions, ground water including that that originates from <br />municipal, commercial, private, and irrigation wells, and surface water drainage from plains <br />thunderstorms. Water temporarily stored at the Bureau of Reclamation's Pueblo Reservoir, <br />completed in 1974, is transported down the Arkansas River channel to specific users including <br /> <br />5 <br />
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