WSP03614

• File Number: 8270.100
• Description: Colorado River Basin Water Quality/Salinity -- Misc Water Quality
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1981
• Author: USDOI
• Title: Quality of Water - Colorado River Basin - Progress Report No. 10 - January 1981 -- Part 1 of 2 -- Title Page through Part IX - page 98
• Water Supply Pro - Doc Type: Report/Study

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ANTICIPATED EFFECTS OF ADlJITIOr,AL DEVELOPMENTS (continued)

back to the system in the sallie reach where they are diverted. The div~rted
water for the Dolores Project will not return to the Dolores River from
which it will be diverted. Katiler the return flows will flow into the San
Juan River above the gage at Bluff, Utah. Flows diverted from the San Juan
River above Archuleta for the Navajo Indian Irrigation Project do not
return to the river above the the gage at Archuleta, but return to the
river above the gage at Bluff, Utah. The additional salts brought in with
theRe return flows would be those picked up from the np.w lands that are
irrigated plus the salts originally in tile water diverted.

14. Between Green River at Green River, Utah, ~an Rafael Kiver near
Green River, Utah, Colorado River near Cisco, Utah, San Juan~ver
near Bluff, Utah, and Colorado River at Lees Ferry, Arizona

Navajo Powerplant. About 34,000 acre-feet (42 x 106,,)) will be used
in that portion of Arizona wi thin the Upper Basin by 1990 and would be
diverted above Lees Ferry. It is expected that the salt will be depleted
with the water. No additional water depletions are expected beyond 1990
but due to increased concentrations, additional salts will be depleted.

Other Municipal Uses in Arizona. Of the Upper Colorado River Com-
pact's allocateci 50,000 acre-feet (62 x 106m3) to Arizona from the Upper
Colorado River systerr., about 13,000 acre-feet 06 x llJbm3) is presently
being uRed. Besides the 34,000 acre-feet (42 x 10bm3) to tne Navajo
Powerplant, additional municipal uses are expected to consume the remaining
3,000 acre-feet (4 x 106m3).

Mill Creek Project, Utah. About 1,000 acre-teet 0.2 x 100m3) of
will be depleted for municipal and industrial purposes and about
acre-feet 0.9 x 106m3) for irrigation. The project is expected
completed during 1~81.

water
1,500
to be

15.

Above the Virgin River at Littlefield, Arizona

Dixie Project, Utah. The authorized Dixie Project was under con-
tract negotiations between the Washington County \Jater Conservancy District
and the Water and Poltier Resources Service during 1973. At a meeting on
February 8, 1973, it was announced by the District that they desired to
cease ne~otiations and not continue with the project.

Warner Valley, Utah. The Washington County Water Conservancy District
and the city of St. George have engaged in studies to cunstruct a smaller
dam and reservoir at Warner Valley, a fonner Dixie Project damsite. There
are plans for the construction of a reservoir with a capacity of 55 000
acre-feet (68 x 106m3) for the storage of 10,000 acre-feet (12 x 106m3)
of water to be used for cooling purposes for a 500 megawatt coal fired
powerplant and 45,000 acre-feet (56 x 106m3) for future municipal and in-
dustrial demand aud supplemental irrigation water. Nevada Power would
utilize 375 megawatts and the city of St. George would utilize 125 mega-
watts at some time in the future. The powerplants would receive coal

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