WSPC06079

• File Number: 8064.100
• Description: Ute Tribes
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 6/1/1987
• Author: Boyle Engineering
• Title: Agricultural Engineering Study - Mancos Watershed - Task D-E - Final Report - Design-Cost Estimate for Off-Farm Irrigation Facilities and PIA Determination
• Water Supply Pro - Doc Type: Report/Study

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and sideroll. As a result, parcels with a corn/soybean rotation

were evaluated with gravity and the center pivot system options only.

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

presently irrigated lands on Southern Ute and 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-irrigablel 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 neares~ water supply and the.

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

ser~e 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.

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