WSP09501

• File Number: 8276.400
• Description: McElmo Creek Unit - Colorado River Salinity Control Program
• State: CO
• Basin: Colorado Mainstem
• Water Division: 7
• Date: 6/1/1983
• Title: Salinity Control by Canal Lining: The McElmo Creek Unit/ Colorado
• Water Supply Pro - Doc Type: Project Overview

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Table 1
Incremental Analysis
(Units are $1,000)

Salt reduction Accuracy
Canal Tons Mg/L (percent)
(metric tons)
Lone Pine 6,090 0.7 18
(5,520)
Upper Hermana 1,740 0.2 16
(1,580)
Rocky Ford 16,170 1.7 22
and Highline (14,670)
Combined
Total 24,000 2.6 20
(21,770)
Capital Cost
Canal
Total Annual
Lone Pine 2,965 246
Upper Hennana 951 79
Rocky Ford 19,251 1,596
and Highline
Combined
Total 23,167 1,921

Interest
Construction During
Cost Construction

2,786

179

896

55

16,451

2,800

20,133

3,034

Annua 1 Cost
Effectiveness
($l,OOO/mg/L)
#Incremental Cumulative
351 351
394 361
939 739

739

and water would be provided to users along the Rocky Ford Ditch by
piped laterals. Results of lining and combining canal sections will
reduce the amount of seepage emanating from canals contributing to sa-
linity in the McElmo Creek Drainage and the Colorado River. The plan's
net effect will be to reduce canal seepage by 50 percent and salinity
by 21 percent, 6,000 acre-feet and 24,000 tons (7,398,000 cubic meters
and 21,800 metric tons), resepectively. Reduction in salinity measured
at Imperial Dam, California will amount to 2.6 mg/L. The project cost
is $23,167,000 with an annual cost effectiveness of $739,000/mg/L.
The Bureau of Reclamation is currently completing its planning re-
port for the project and will proceed into preconstruction planning
when funds become available to collect design data. Preconstruction
planning will require three years to complete and construction will re-
quire an additional three years.

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001565

8

Roche and Davison