WSPC03520

• 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 - La Plata 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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0.4.3 Cropping Pattern
For the preliminary analysis of PIA, a cropping pattern with the
highest net agricultural returns was used. Table D.3 identifies
this cropping pattern as well as the net agricultural return.
Parcels in the La Plata watershed are located in climatic zones D, E,

F, G, and H.

D.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 D.4 identifies only those parcels with
an initial positive residual payment capacity requiring further
consideration. A total of 82 parcels covering 2,573 acres showed an

initial positive residual payment capacity.

An off-farm irrigation transmission system was designed for those

parcels near the La Plata River showing an initial positive payment

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

summarized in Table D.5. Parcels with a positive payment capacity

after comparing the residual payment capacity to the cost of water

are initially identified as practicably irrigable.

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