WSP01115

• File Number: 8220.126.J
• Description: San Miguel Project
• State: CO
• Basin: San Juan/Dolores
• Water Division: 4
• Date: 12/5/1979
• Title: San Miguel Project: Alternative Plans of Development
• Water Supply Pro - Doc Type: Report/Study

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Improve High Elevation Runoff Collection

This alternative plan was to determine the amount of Hater that

.
could be potentially developed from high elevation runoff, The

av.erage runoff estimate from locations in the project area are as

follows:

Estimated Average Annual Water Supply
(Acre-Feet)

Intake
System

Gurley Canal
Cone Canal
Lilylands Canal
Hughes Canal

Currently
Developed

23,530
3,720
3,730
4,000

Remaining
Runoff

Average
Runoff

26,890
4,250
6,590
11,750

3,360
530
2,060
7,750

The limited high elevation runoff 'records indicate that the

present systems develop the maximum volume of runoff that can be

expected.

Conveyance losses in the Cone and Gurley intake systems account

for the majority of the water in the remaining runoff column,

The runoff developed by the Lilylandssystem is limited by the

size and location of the reservoir. This system could develop an

additional mean runoff of 2,000 acre-feet if the intake system was

adequate to handle the runoff flows, and sufficient storage was

available.

The Hughes system only develops 34 percent of its potential

runoff because it does not have a storage facility. The development

of an additional 6,000 acre-feet from this drainage also requires an

adequate intake system to handle the runoff flow, and an adequate

storage facility.

The cost of the required structures, to develop the additional

runoff in the above two systems, would far outweigh the benefits.

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