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San Juan-Charna Water Accounting Albuquerque Area Office April 2000 The natural inflow into Heron Reservoir during the month of April was computed to be 2234 acre-feet (AF) as shown in Table 3. There were 1703 AF net San Juan- Chama (SJ-C) losses, as shown in Table 2. There were 15864 AF diverted through Azotea Tunnel this month. There was a total of 7819 AF of Natural (RG) released from Heron. There was 19900 AF of SJ-C released in April of which 15952 AF was the City of Albuquerque's delivery; 11860 to the Middle Rio Grande Conservancy (MRGCD) in EI Vado, 4092 to the City's pool in Abiquiu, 400 AF for Bernalillo to there pool in Abiquiu, 15 AF for Twining to the City's pool that the Bureau of Reclamation (USBR) leases for supplemental water (USBR lease) in Abiquiu, 320 AF was the Middle Rio Grande Conservancy District's (MRGCD) delivery to El Vado, 400 AF was Taos's delivery to the City pool (USBR's lease) in Abiquiu, 400 AF of Los Lunas's delivery to the City (USBR lease) in Abiquiu, and 500 of Belen's water to the City pool (USBR lease) in Abiquiu, 60 AF of Red Rivers delivery to the City (USBR lease) in Abiquiu, and 1853 AF of un contracted water to the City (USBR lease) in Abiquiu. There were 2300 AF released from EI Vado in the month of March, of which 1200 was Los Alamos County's delivery to the City (USBR lease) in Abiquiu, 100 AF was Los Lunas's delivery to the City (USBR lease) in Abiquiu, 1000 AF was Espanola's delivery to the City (USBR lease)in Abiquiu. There were 6404 AF of SJ-C water released from Abiquiu, of which 938 AF was MRGCD's release for irrigation demand, 538 was released from the City to Jemez, 4379 AFwas released from the City (USBR lease) for supplemental irrigation water in the middle valley, 18 AF was released for Los Lunas for use below Otowi (letter dated 4/4/2000), 85 AF for Bernalillo for use below Otowi (letter dated 4/5/2000), 375 AF for Santa Fe (362 AF below Otowi and 13 above Otowi, letter dated 4/5/2000), 71 AF for the City (54 AF below Otowi and 17 AF above Otowi, letter dated 4/5/2000) . There was 0.36 inches of precipitation at Heron Reservoir, which is 33% of the April 1.10 (running average of 1.70 inches). The monthly computations for Heron Reservoir are summarized in Tables 1-3. Total inflow into Narnbe Falls Reservoir was computed to be 703 AF. There were 17 AF of losses on the reservoir. Table 4 summarizes San Juan-Chama water at Otowi. Estimated sediment deposition in the San Juan-Chama pools at Abiquiu and Jemez Canyon Reservoirs, and Cochiti Lake are presented in Tables 5A-5C. Storage and evaporation of Rio Grande water in El Vado and Abiquiu Reservoirs are shown in Table 6. All data are provisional and subject to revision as final data are collected and analyzed.