WSPC06979

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

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I Therefore, it was not necessary to perform any operational studies

involving storage reservoirs.

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D.4.3 Cropping Pattern
For the preliminary analysis of PIA, a cropping pattern with the
highest net agricultural returns was used. Table 0.2 identifies
this cropping pattern as well as the net agricultural return. The
parcels in the piedra watershed are located in climatic zones 0, E,

and F.

0.4.4 Preliminary PIA Analysis

A preliminary PIA analysis was performed comparing a parcel's
payment capacity with a preliminary estimate of the cost to pump
water from the river to the parcel. This preliminary water cost was

based on the static pumping lift (the difference in elevation from

the water surface in the river to the elevation of the parcel) for

gravity irrigated fields or plus a field delivery pressure of 60 psi

for sprinkler irrigation. Detailed tabulations of the analysis are

shown in Appendix 0.1. Table 0.3 identifies only those parcels with

an initial positive residual payment capacity requiring further

consideration. A total of 24 parcels covering 819 acres showed a

positive residual payment capacity.

An off-farm irrigation transmission system was designed for those

parcels near the Piedra River showing an initial positive residual

payment capacity. Those calculations are shown in Appendix D.2 and

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