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. . . o ",:>. en l~ Bureau of Reclamation Colorado River Basin Salinity Control Program Accomplishments for fiscal year 1997 Colorado River Water Use Data Colorado River Simulation System (CRSS) is used extensively by Reclamation to forecast salinity conditions and evaluate compliance with the water quality (salinity) standards. To accomplish this task, accurate water use data is needed as a base for these predictions. In cooperation with the Upper Basin States, Reclamation has created a GIS database of irrigated field boundaries and crop types to refine current water use estimates in the entire basin. In 1997, Reclamation completed its GIS database and has produced draft water use estimates for the Upper Basin thru 1990. In 1998, Reclamation plans to finalize this analysis and begin to update the analysis thru 1995. Update to Economic Impacts Model In cooperation with the Metropolitan Water District of Southern California, Reclamation is well into a major update of its salinity impact model. The model is now available in a Lotus spreadsheet format. Crop types and acreages in the model have been updated. The crop damage functions have been updated using scientific studies conducted by the UDSA Salinity Research Lab in Riverside, California. Car radiator impacts have been dropped due to advances in their designs. Because of losses in some sectors and gains in others, there has been no significant changes in the total damages sustained in the Lower Basin. Several improvements will be investigated 1998. Studies are underway to update the M&I impacts section of the model and add some drainage costs to the agricultural sector . Wastewater reuse was not addressed in the current model. Price-San Rafael Rivers Unit, Utah Three cost-effective proposals were received from waterusers in the Price-San Rafael Rivers Unit in response to Reclamation's request for proposals under P.L. 104-20. Construction cooperative agreements have been completed and funds obligated to begin construction on all three proposals. The projects are being funded by Reclamation's Basinwide Program and cost sharing from the Basin States. San Juan River Unit, New Mexico A cost-effective proposal was received by Reclamation to improve the efficiency of irrigation delivery systems in the Hanunond Project in response to Reclamation's request for proposals under P.L. 104-20. A construction cooperative agreement has been completed and funds obligated. The Hanunond Project has purchased equipment and will begin construction in FY98. This project is being funded by Reclamation's Basinwide Program and cost sharing from the Basin States. 16 ~,--;\".""- ~ ~j ~,<. __ ,a..K>.;""