WSP00960

• File Number: 8276.150
• Description: Grand Valley Unit-Colorado River Basin Salinity Control Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1974
• Title: A Look At Salt Pick Up from Irrigated and Non-Irrigated Lands with Special Emphasis on the Effect of On-Farm Water Management Measures in Reducing Salinity of the Colorado River
• Water Supply Pro - Doc Type: Report/Study

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TABLE 6
TREATMENT OPPORTUNITIES, COST AND IMPACTS
GRAND VAllEY

Irrigated Area

Annual
Seepage
Reduction
(Ac-Ft)

Off-Farm Conveyances

laterals only - realiqnment,)
consolidation, 650 mi. )
lining or piping and 2,600 ) 42,000
structures, etc. )

.On-Farm System and Management

1,100 mi. ditch lining )
42,000 ac. land formi ng )
~ -a,ooo control structures )
66 mi. drainage systems )61,000
14,000 ac. change method )
12,000 ac. automation )
68,000 ac. water management)

. Off-Farm Return System

Treat Main Drains and
Washes - 88 miles

TOTALS

103,000

Annua 1
Salt
Reduction
(Tons)

Install ation
Cost Per Ton
of Annual Salt
Reducti on
~

Install ation
Cost
-----01 ,000)

105,OOOl!

13,000

124

153,0002/

27,000

176

_./

20,0001'

5,000
45,000

250
162

278,000

l/ 42,000 A-Fseepage reduction times 2.5 tons/AF/yr equal 105,000 tons.

2/ 61,000 A-F seepage reduction times 2.5 tons/AF/yr equa'l 153,000 tons.
3/173,000 A- F return reduction times 0.1 + tons/ AF/yr equa'l 20,000 tons;
this reduction in return flow requires a corresponding reduction in
water diverted to the irrigation system.

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