WSP10512

• File Number: 8220.125.H
• Description: San Juan-Chama Project
• State: NM
• Basin: San Juan/Dolores
• Date: 2/1/1963
• Author: USDOI/BOR
• Title: Accounting of Water San Juan-Chama Project Colorado-New Mexico
• Water Supply Pro - Doc Type: Report/Study

the RiG Grande C6~act Commission. '1'he preparation of
detailed designs and specifications for. the works proposed
to be constructed :Ln. connection with prGjeets shall be
carried as far forward as the investigation thereof
indicatEls is reasonable in the circumstances."
,

under the authorized San J"ttIm-Chams. Project, direct diversions
of San Juan River Basin water will be lilade from the Rio Blanco, the Little
NavajO River, and the Navajo River for export .~o the Rio Grande Basin
throu8h the Azotea Tunnel. I~orted water will be stored in Heron No, 4
Reservoir on Willow Creek, a tributary of the Rio Chama above El Vado
Reservoir. Releases will be made from. Heron No. 4 Reservoir to Willow
Creek and. the Rio Chams. to co~ensate Rio Grande flows for depletions
Claused by irrigation on the trib"t1.tary \'lrli ts and. to make deliveries to
the Rio Grande for other project purposes. The average annual~use of
the i~orted water, as shown on page 5, IID424, 86th Congress, is as
follows:

(Unit - 1,000 acre-feet)

Tributary units:
Cerro-. . . . . . ... . .. . .. . ".. . '*' " .. .. . . .. .. .. .. . to
Taos. .. . .. . . CI .. . .. . .. .. . . . . . . . . .. ill . . . .'. .. .
:IJ.ano............... "'................................
Pojoaque....~...................e~.

Oity of Albuquerque~.........o..........
. .

Middle Rio Grande Conservancy District..

Total.... ... ................ .. .. . . ... 11 " ..... ......... .. ..

y.
y

On-site
Demand.

Off-site DeiDand
at Azotea Tunnel !I

9.0 Y.
11.2 Y.
6.0 y.
~y.
2b:9y

9.9
12.4
6.7
....Q.:.2
29.9
57.5

50.0
15Mi
96.4

22.6
-

110,0

NEit depletion a.t the Otowi gaging station.
:rncl1i1desaD,owance for conveyance losses and evaporation from. Heron
No.4 Reservoir. .

The developllllilnt of pl'oJec1l-type irrigation on the Tributa.ry lJi:l.its
woUld resut in an annual depletion of the Rio Grande flows at the otowi.
gaging station if not eOlllpensated.for by San J'IiM"C1ia.ma:i?rojeet water; ..
Dur:i.ng the year there will be both d.epletions" 6:1.';arid.aeeretienilto,""the
Rio Grande flC>ws.at otowi. . In general, depletions will 'occUr'vihen water
is be:i.ng s'llored.1n-the reservoirs "of the Tributary utlits and when diver-
sions of natural flows are greater than the historica.l, nenproject d.iver-
silimil. During periods of low flows, and. during the nonirrigation season,.
there will be acoretions resulting from. additional return flows from.

4

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