WSPC00157

• 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 - San Juan West 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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payment capacity. Those calculations are shown in Appendix D.2 and

summarized in Table D.4. Parcels with an initial positive payment

capacity after comparing the residual preliminary payment capacity

to the cost of water are initially identified as practicably

i rr igable.

A number of parcels in the San Juan West Watershed had an initial
residual preliminary payment capacity even though the distance to
the river was considerable. Instead of designing individual lines
of supply to each of these remote parcels, a single line was sized to
serve all parcels. The per acre cost of this single transmission
line was compared to the residual preliminary payment capacity of
each parcel.

D.4.5 Preliminary Practicably Irrigable Acreage Determination

Table D.5 and Figures D.l through D.3 identify the preliminary

practicably irrigable acreage for the San Juan West Watershed. A

total of 206 acres was identified as PIA with an estimated annual

water diversion of 626 acre-feet from the San Juan River.

In order to finalize the PIA determination, the cropping pattern and

net agricultural returns were re-evaluated by the economist (Western

Research Corporation) on a parcel-by-parcel basis and adjusted to

reflect individual parcel characteristics. Another engineering

analysis comparing the revised payment capacity with a revised off-

farm irrigation system and cost was performed as presented in the

following Section D.4.6.

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