WSPC04207

• File Number: 8064.100
• Description: Ute Tribes
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 9/1/1986
• Author: CO Dept of Law
• Title: Agricultural Engineering Study - San Juan West Watershed - Task D-E Report - Step A - Design-Cost Estimate for Off-Farm Irrigation Facilities and PIA Determination
• Water Supply Pro - Doc Type: Report/Study

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options only.

The first step in making this task analysis was determination of the

presently irrigated lands on ute Mountain Ute Indian lands. W. W.

Wheeler & Associates, Inc., hydrology consultant, identified from

aerial photographs and other information available to them the lands

presently irrigated and provided to Boyle a marked print of the base

map. The amount of irrigated acreage was then planimetered from the

base map and tabulated. It should be noted that presently irrigated

land covers some land not classified and Class 6 (non-irrigable)

soils as determined by Stoneman-Landers, soil consultants.

For the remaining irrigable parcels, an analysis was made to

determine the residual water payment capacity when only the off-farm

static pumping lift costs where added to the on-farm costs identified

in Task B. Based on the elevation of the nearest water supply and the

elevation of the highest point in each parcel, the static lift to

serve the parcel was calculated using the computer program developed

for the Task B report. The power cost to lift the annual water

requirement to each field was then calculated assuming a 75 percent

pumping plant efficiency which is a conservatively high assumption;

and a field delivery pressure of 60 psi for all but gravity irrigated

fields.

It should be noted that the parcel water payment capacity residual
analysis (Appendix D) was slightly modified from the analysis
presented in the Task B draft report. Land leveling costs for

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