BOARD00069 - Laserfiche WebLink

Home Browse Search

I ~ ( on the ice as Heron is drawn down. If hazardous conditions develop, releases are terminated until conditions are safe. During late March or April, any SJ-C Project water for which waivers were granted, but which was not released because of unsafe winter operation conditions, is released at a time when it will accomplish the same purposes as if it had been released during the winter months. e POJOAQUE TRIBUTARY UNIT--SAN JUAN-CHAMA PROJECT Project Features The Pojoaque Tributary Unit provides supplemental water (1,030 ac-ft) for approximately 2,768 acres of irrigated land of which, Indian lands comprise approximately 34 percent of the total. The storage feature of the SJ-C Pojoaque Tributary Unit is Nambe Falls Dam and Reservoir located on the Rio Nambe. It is a concrete and earth embankment structure 1 50 feet high, which forms a reservoir of 2,020 ac-ft capacity. Construction of Nambe Falls Dam began in June 1974, and was completed in June 1976. The operation and maintenance of Nambe Falls Dam and Reservoir is performed by the Pojoaque Valley Irrigation District. ,,,,.. Water which is physically stored in the reservoir is natural to the Rio Grande Basin but the reservoir is operated as if it were SJ-C water. San Juan-Chama water is released from Heron Reservoir to offset depletions of natural water as a result of reservoir operations at Nambe Falls Dam. The objective is to make the flows whole at the Otowi river gauge (i.e. as if Nambe Falls Reservoir did not exist). e EL VADO RESERVOIR--MIDDLE RIO GRANDE PROJECT Project Features Although it was completed thirty years earlier, the outlet works for EI Vado Dam (6,600 ft"/s capacity) were enlarged in 1965-66 so that SJ-C Project releases from Heron Reservoir could be passed unimpeded through the dam. EI Vado Dam was originally constructed by MRGCD to provide conservation storage for irrigation use on lands along the Rio Grande from Cochiti Dam to below Socorro, New Mexico. Because EI Vado Dam was constructed after 1929 (completed in 1935), reservoir operations for storage and release are subject to the terms and restrictions of the Rio Grande Compact, when it involves water natural to the Rio Grande Basin. Water imported into the Rio Grande Basin via the SJ-C Project and stored in EI Vado Reservoir is not subject to storage and release restrictions of the Rio Grande Compact. l ) e 5