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<br />Cochiti Lake <br />Cochiti Dam and Lake is a U,S, Corps of Engineers facility and Public Law 88-293 <br />authorizes the Secretary of the Interior to make SJ-C water available to maintain a <br />permanent pool of 1,200 surface acres for fish and wildlife, and recreation, The Santa <br />Fe River arm of the reservoir, known as the wetlands area, is accounted as part of the <br />total authorized recreational pool. An accounting procedure was developed in 1987 <br />to address this and is presented in Table 9 (page 9). <br /> <br />The delivery of SJ-C water to the recreation pool is based on maintaining the allowable <br />surface acres as illustrated in Column 7 of Table 9, As the wetlands area is reduced <br />by evaporation, additional surface area becomes available in the main pool allowing for <br />further deliveries of SJ-C water. Losses from the pool are accounted and replaced as <br />required to maintain the allowable surface area, The SJ-C pool was adjusted monthly <br />to compensate for displacement by deposited sediment, Reclamation had estimated <br />the 1990 - 1998 accumulated-sediment inflow into Cochiti at 11,632 AF, A Corps <br />of Engineers' 1998 survey determined the actual amount of sediment that had <br />accumulated in Abiquiu between .1990 - 1998 to be 7,874 AF, The Corps of <br />Engineers' survey became effective as of December 31 ,1998, As such, the 1998 end <br />of year values for both accumulated sediment and Rio Grande content were adjusted <br />accordingly in Table 11 B, <br /> <br />Gate construction activities iat Abiquiu ran through April 1, 1999, In order to meet <br />irrigation demand within the Middle Rio Grande Valley, 2,868 AF of.SJ-C water was <br />borrowed from Cochiti from March 15 - AprllL This water was paid back with a total <br />of 2,904 AF ofSJ-C from Abiquiu from April 2 - 16, Column 5 in Table 11 B shows <br />the water borrowed as Rio Grande, Although the water borrowed. for irrigation <br />demand was SJ-C water, it was necessary to label any water borrowed as Rio Grande <br />in order to more closely track the total amount of water released from Cochiti <br />Reservoir, This was due toa programming bug within Reclamation's dally reservoir <br />programs which would not recognize a release from Cochiti labeled as SJ-C water, <br /> <br />Monthly readings were taken from a staff gage each month and estimated to the <br />nearest tenth of a foot in Table 9 Column 5 which is converted to a surface area in <br />Column 6 in the same table, .., <br /> <br />. <br />San Juan-Chama deliveries to replace losses on the reservoir's permanent recreation <br />pool are usually performed (Table, 9, Column 10) in accordance with the <br />recommendations made in the eochiti Lake Re-regulation Interagency Biological Report <br />published in June 30, 1993, <br /> <br />Column 10 in Table 9 shows that 1998 deliveries of SJ-C water to Cochiti were <br />completed in April. As of December 31, 1999, a total of 3,786 AF of 1999 deliveries <br /> <br />v <br />