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San Juan-Chama Water Accounting Albuquerque Area Office September 1995 The natural inflow into Heron Reservoir during the month of September was computed to be 150 acre-feet (a. f.) as shown on Table 3. Net San Juan-Chama losses were 930 a.f. as shown on Table 2. There were no diversions through Azotea Tunnel this month. There was a total of 190 a. f. of natural released (mostly seepage) in September from Heron. A total of 3,034 a.f. of San Juan-Chama was released for the City of Albuquerque to MRGCD in EI Va do (payback for water borrowed to assist with rafting releases) . Total precipitation at Heron Reservoir was 1.47 inches which is 87% of normal. The monthly computations for Heron Reservoir are summarized in Tables 1-3. In September a total of 597 a. f. was released for Santa Fe from Abiquiu below Otowi and 18 a.f. above Otowi (SEO letters August 25 and September 21, 1995). A total of 153 a.f. was released for the City of Albuquerque from Abiquiu below Otowi and 4 a.f. above Otowi (SEO letter September 19, 1995). A total of 16,884 a. f. was borrowed from the City of Albuquerque in Abiquiu for MRGCD to meet irrigation demand below Otowi. A total of 100 a. f. was borrowed from the City of Albuquerque in Abiquiu for Nambe Falls Reservoir. At the end of September, MRGCDs balance was 15,958 a.f. for San Juan-Chama previously borrowed from the City of Albuquerque in Abiquiu to meet irrigation demand. Total inflow into Nambe Falls Reservoir was computed to be 362 a.f. Evaporation loss on the reservoir was 3 a.f. 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 EI Vado and Abiquiu Reservoirs are shown on Table 6. All data are provisional and subject to revision as final data are collected and analyzed.