WSP02305

• File Number: 8220.106
• Description: Animas-La Plata
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 12/1/1994
• Author: Bookman-Edmonston
• Title: Economic Impact Study - Animas-La Plata and Colorado Ute Water Rights Settlement Act
• Water Supply Pro - Doc Type: Report/Study

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REGIONAL ECONOMY WITHOUT PROJECT

adequate, there would be no flow for SJWC 25-26 percent of the time. In other words, SJWC

could be without any flow during the mid- to late-summer season of those years, potentially

creating a desperate situation because of a completely dry Animas River channel. Thus, in

order to meet demands on a firm M&I schedule, a storage reservoir would be required to

meet these demands during approximately five percent of the years. Black & Veatch7

determined that such a storage reservoir would require a capacity of approximately

12,000 acre-feet.

Black & Veatch conducted a master water supply study for SJWC and evaluated several
alternatives for developing the 30,800 acre-feet under a no ALP scenario. The preferred
alternative included a 12,000 acre-foot, off-stream reservoir located at the mouth of Barton
Arroyo. Water would be diverted from the Animas River just south of the state line. The
water would be delivered to the reservoir via a 20-mile combination concrete-lined canal
and pipeline with a design capacity of 60 ds. The reported capital costs in January 1981
dollars for the reservoir and supply canal are $18,030,000. The annual operation and
maintenance (O&M) costs, also reported in January 1981 dollars, are $40,000 per year. The
corresponding capital and O&M costs in 1993 dollars are $28,221,860 and 62,600,
respectively.

The question then arises if there are any incremental costs for this alternative beyond the
cost (or benefits) included in Reclamation benefit-cost analysis that should be included in
a regional benefit-cost analysis of ALP. Determining if any additional benefits should be
included in the regional benefit-cost analysis would require a detailed review of the benefits
and costs allocated to SJWC for deliveries under ALP. It should be noted that Kirkpatrick
indicated that the maximum payment by SJWC specified in their ALP contract is
$16,640,000. If the allocated share of costs exceeds this $16,640,000, then the contract has a
provision that the amount of water to be delivered for this price can be reduced.

7 Black & Veatch Consulting Engineers, Inc., Water Supply Master Plan for San lwm County New Mexico,
report prepared for San Juan County, January 1981(a).

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