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for FY 1984 was prepared. The report gives preliminary data regarding changes that have occurred in wildlife habitat since the inception of the project. Information and educational support activities have been provided ~A through the USDA Federal Extension Service and the State Cooperative Extension 00 Service (CES) agencies. Like ASCS and SCS, the Extension Service and the ~ State CES agencies have relied on existing authorities and funding mechanisms ~l to provide the extension education support. Existing extension staffs such as Extension Agents and Extension Irrigation Water Management Specialists have provided some general levels of limited education support. These include newsletters, water management workshops, and other educational efforts as a part of their ongoing extension education programs. A special full-time irrigation extension agent in Grand Valley was the most significant extension education support in recent years. Lack of funding caused termination of the position in 1985. This sort of extension education support could play a valuable and important role in project visi- bility, local understanding, and local acceptance. Research and demonstration activities continue to be important to the development of new technologies and improvement of water management practices for control of soil and water salinity. The Agricultural Research Service (ARS) provides national leadership for salinity related research and demonstration activities. In addition, the Cooperative State Research Service (CSRS) and State Agricultural Experiment Stations (SAES) provide the leadership and conduct research funded from Federal and State sources. The majority of the ARS salinity activities are conducted at the U.S. Salinity Laboratory in Riverside, California; the U.S. Water Conservation Laboratory in Phoenix, Arizona; the Agricultural Engineering Research Center in Ft. Collins, Colorado; and the Snake River Conservation Research Center at Kimberly, Idaho. C. Title II Unit Summaries For co~~arison ~Jrposes, Table VII-l on the following page slliurnrrarlzes salinity control unit cost-effectiveness based on the same (8 5/8 percent) interest or discount rate and are indexed to January 1986 prices. 1. Big Sandy River Unit (Reclamation and USDA) The Big Sandy River Unit is located in southwestern Wyoming, in Sweetwater County. The Big Sandy River begins in the Wind River Mountains where the water is good. Below Big Sandy Dam, the river is diverted to irrigate the Eden Project. Return flows from the irrigated area and small stream tributaries make up the flows of the lower Big Sandy River. Drilling investigations have shown that the shallow aquifers near the river are the source of saline seeps. Saline seeps and springs below the Eden Project contribute an estimated 116,000 tons of salt. Along with other tributaries, a total of approximately 164,000 tons of salt is contributed annually to the Green River. Test well pumping indicates that the saline water could be intercepted before seeping into the river. VII-ll