WSP02202

• File Number: 8220.125.N
• Description: San Juan-Chama Project
• State: NM
• Basin: San Juan/Dolores
• Date: 12/1/1997
• Title: San Juan-Chama Project Water Accounting for 1997
• Water Supply Pro - Doc Type: Report/Study

San Juan-Chama
Water Accounting
Albuquerque Area Office
March 1997

The natural inflow into Heron Reservoir during the month of March was computed
to be 10420 acre-feet (AF) as shown in Table 3. There were 733 AF net San Juan-
Chama (SJ-C) losses, as shown in Table 2. There were 9299 AF of diversions
through Azotea Tunnel thi s month.

There was a total of 10393 AF of Natural (RG) released from Heron, of which 133
AF was seepage. There was 12554 AF of SJ-C water released from Heron, of which
1088 AF was sent to the City of Albuquerque (the City) in Abiquiu as part of
their 1997 annual allocation. The other 11466 AF was sent to the Middle Rio
Grande Conservancy Di strict (MRGCD) in El Vado.

There was 0.01 inches of precipitation at
March (running) average of 1.70 inches.
Reservoir are summarized in Tables 1-3.

Heron Reservoir, which is 1% of the
The monthly computations for Heron

From El Vado, 2000 AF was released by MRGCD to their pool in Abiquiu. A total of
11466 AF inflow of MRGCD water was sent to their pool in El Vado.

From Abiquiu, a total of 3764 AF was released from the City's pool to the Jemez
Sediment pool. A total of 3325 AF of SJ-C water flowed into Abiquiu: 1980 AF of
MRGCD water into their own pool: 1345 AF of City 1997 allocated water into the
Ci ty pool.

Total inflow into Nambe Falls Reservoir was computed to be 525 AF. Evaporation
loss on the reservoir was 10 AF. 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.