WSP02633

• File Number: 8200.750
• Description: San Juan River General
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 6/1/1987
• Author: Wheeler and Assoc
• Title: Documentation for San Juan River Hydrology Analysis - Historic and Virgin Flow Conditions - June 1987
• Water Supply Pro - Doc Type: Report/Study

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PART vn. DITCH DIVERSION RECORDS

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Diversions in the San Juan River Basin

For the period beginning in water year 1974 (November 1973), the State

Engineer's staff has prepared a computer data file of all diversion records in

the San Juan River Basin above the Navajo Reservoir. Diversion records prior

to 1974 are available from Water Commissioner field books on file at the Office

of the State Engineer, although records during the 1950's and 1960's are incom-

plete or missing entirely for many of the ditches.

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Transbasin Diversions

The Treasure Fass Ditch diverts water from Wolf Creek, a tributary

of the West Fork San Juan River, to the Rio Grande drainage. Annual diversions

have averaged 234 acre-feet per year during the 1951 through 1980 study period.

A summary of the Treasure Pass Ditch diversions are presented in Appendix C.

The Dutton Ditch diverts water from the Fourmile Creek, a tributary of the

San Juan River upstream from Fagosa Springs, into Stollsteimer Creek, a tributary

of the Piedra River. Diversion records prior to 1964 are not available, but have

been estimated based upon diversions in subsequent years. Diversions for the

1964 through 1980 period have averaged about 860 acre-feet per year. Diversions

prior to 1964 were estimated to be 600 acre-feet per year. A summary of the

Dutton Ditch diversions is presented in Appendix C.

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The San Juan-Chama Project is a U.S. Bureau of Reclamation (USBR)

project located in South central Colorado and Northcentral New Mexico for

the diversion of water from tributaries of the Upper San Juan River basin, through

the Azotea Tunnel for utilization in the Rio Grande basin. Diversions are made

from the Rio Blanco, Little Navajo, and Navajo rivers. The Colorado Division

of Water Resources (CDWW), Division 7 Office maintains records of flow into

the diversion tunnel at each of the three diversion points. Discharge records

at the outlet of the diversion tunnel in New Mexico are maintained by the USBR

and are available from the U.S. Geological Survey, Water Data Reports for

New Mexico.

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