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<br />. <br /> <br />305 ~tate line. <br />of 1939, but <br />completed in <br /> <br />Construction of the dam was started in the fall <br />was suspended from 1943 to 1946. The dam was <br />1948. <br /> <br />. <br /> <br />John Martin Reservoir has a storage capacity of 631,121 acre- <br />feet at maximum pool elevation, based on the sediment survey <br />of 1966. Of this capacity, 10,OaO acre-feet is reserved for <br />a permanent pool, 267,218 acre-feet is for flood control, <br />and 353,903 acre-feet allocated to irrigation. At flood <br />pool level, it inundates 17,875 surface acres. <br /> <br />The Arkansas River Compact stipulates that the water of the <br />Arkansas River shall not be materiallY depleted in use able <br />quantity or availability for the use to the water users in <br />Colorado and Kansas by future development or construction. <br />Therefore, any water stored in Pueblo Reservoir during a <br />flood when the conservation pool of John Martin Reservoir <br />is not full, will have to be released to John Martin at a <br />rate not to exceed the safe channel capacity of 5,000 <br />cubic-feet per second below Pueblo Dam. The reservoir pro- <br />vides very little recreation opportunity because it is fre- <br />quently drained dry during the summer season. <br /> <br />b. The Pueblo Floodway on the Arkansas River extending through <br />Pueblo and the Barrier Dam located immediately upstream from <br />Pueblo Dam were constructed by the Pueblo Conservancy Dis- <br />trict, which was formed shortly after the flood of 1921. <br />The Barrier Dam is a concrete gravity and earthfill struc- <br />ture designed to check and partly regulate the major floods <br />on the Arkansas River before they enter the Pueblo Floodway. <br />Replacement storage of 21,000 acre-feet will be included in <br />Pueblo Reservoir to offset the loss of flood control storage <br />presently provided by the Barrier Dam. This is in addition <br />to flood control requirements to control the design flood. <br />Flood storage by the Barrier Dam is due to surcharge because <br />there are no control gates on the existing structure. The <br />Bureau of Reclamation will replace this storage by surcharge <br />storage above the spillway crest of Pueblo Reservoiro <br /> <br />c. The City of Pueblo plans to construct a 60 million gallon- <br />per-day water treatment plant on Federal lands immediately <br />below the damsite. The plant will treat the water for muni- <br />cipal and industrial uses. Recommended treatment would in- <br />clude filtration, disinfection, taste and odor removal, <br />stabilization facilities and possible softening capabilities. <br />Tentative plans indicate the plant will primarily serve <br />Pueblo and possibly Arkansas River Valley towns and com- <br />munities receiving water via the Arkansas Valley conduit. <br /> <br />A multilevel outlet will be constructed in Pueblo Dam to <br />transport water from Pueblo Reservoir to a connection <br />point below Pueblo Dam for exclusive use of the City of <br /> <br />. <br /> <br />18 <br />