WSP09806

• File Number: 8273.100
• Description: Colorado River Basin Salinity Control - Federal Agencies - Bureau of Reclamation
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 11/1/1985
• Author: BOR
• Title: 1985 Evaluation of Salinity Control Programs in the Colorado River Basin
• Water Supply Pro - Doc Type: Report/Study

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impac~s rrom 3,368 acres of irrigated cropland and 4,500
linear feet of off-farm irrigation system laterals. In
additVon to practices in LTA's, 55 annual practices were
installed which partially treated 1,485 acres of irrigated
cropland.

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At the end of FY 1985, salinity program participants had
achiei€d irrigation water management on 18,000 acres,
reduci~g salt loading to the Colorado River by an estimated
15,447' tons. Treatment of 23,169 linear feet of off-farm
latera~s has reduced salt loading by an additional 3,711
tons. . Overall, average annual salt reduction to date has
been 119,158 tons. Approximately 26 percent of project funds
have b~en obligated and approximately 19 percent of pro-
jected salt load reduction benefits have been achieved.

Authorized for Construction

This s~ction discusses DOI projects that have been
author~zed for construction and USDA projects which have met
the pr~requisites for construction and are awaiting funding.

Lower Gunnison Basin Staqe I (BR/USDA)
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The Un~ompahgre portion of Reclamation's Lower Gunnison
Basin pnit was authorized under Public Law 98-569 signed on
Octobek 30, 1984. Advance planning studies were initiated
on the: winter water portion in FY 1984. The winter water
replac~ment plan alone would reduce salinity at Imperial Dam
by about 74,300 tons with the total plan reducing salinity
by 1401,600 tons.

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The Tr~-County Conservancy District indicated willingness to
extend: their contract with Reclamation to include collection
of onf~rm preconstruction design data and cost estimates or
the wihter water features.

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The SC~ onfarm report completed in September 1981 outlines
an imp~ementation plan that is compatible with the
Reclam~tion plan. A more cost-effective subarea is expected
to be Qdentified for high priority implementation.

Moapa Yalley NV (USDA)

SCS published its report on Moapa Valley in February 1981.
The project covers a 5,000 acre irrigated area on Muddy
River upstream of Lake Mead. The project includes installa-
tion o~ 17 miles of underground piped delivery system,
onfarm' water management, and salinity control practices.

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