WSP03388

• File Number: 8041
• Description: 208 Clean Water Grant
• State: CO
• Date: 3/4/1982
• Author: CWCB
• Title: Quarterly Reports on the 208 Clean Water Grant for the Water Quality Control Division of the Coloradio Dept of Health
• Water Supply Pro - Doc Type: Publication

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3689

Lower Gunnison Basin Unit (SCSI - Colorado

The Soil Conservation Service released their "Final Report
of the Lower Gunnison Salinity Control Study" in November, 1981.
The scope of the study was limited to inventorying and analyzing
current on-farm irrigation systems and practices on about 107,000
acres of irrigated land and 320 miles of off-farm canals and
laterals. The result of these analyses were expanded to be
representative of the approximately 171,000 acres of irrigated
land and about 485 miles of off-farm canals and laterals in the
Lower Gunnison and Uncompahgre River Valleys. Approximately 550
miles of canals and laterals within the Uncompahgre Project were
included in the Bureau of Reclamation feasibility study and were
not considered by the SCS.

The recommended plan combines irrigation water management at
the minimum level of implementation on 89,400 acres, irrigation
water management and on-farm ditch lining at the minimum level
for 7,900 acres, irrigation water managment and on farm ditch
lining at the maximum level of implementation for 71,700 acres,
and the lining of 104 miles of off-farm laterals. The minimum
level of implementation involves installation of water measuring
devices and land leveling whereas the maximum level of implemen-
tation includes items such as pipe structures, closed drains, and
semi-automated water release systems. If implemented, the recom-
mended plan would result in an annual salt load reduction of
335,000 tons at a cost of $477,000 mg/L reduction at Imperial
Dam.

Implementation of the proposal will be held up indefinitely
pending funding clarification.

DRS/gl
12/7/81

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