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other goals and standards established during decision-making at the national, regional, state, and local levels. ~ l- I- N Activity plans, which traditionally have been more detailed and focused on smaller land units with significant resource pressure, will become much more integrated. The BLM will continue to develop and favor focused interdisciplinary monitoring and assessment methodologies which serve multiple purposes over single purpose techniques and efforts. Well Plu&&il1& Activities As the agency responsible for leasing all federally-owned mineral resources, opportunities occur for BLM and cooperating agencies to reduce saline water discharge from oil and gas operations. Production water disposal requirements are outlined in "Notice to Lessees and Operators of Federal and Indian Oil and Gas Operations". BLM has worked closely with the New Mexico Oil Conservation Division to plug several orphan wells having no clear owner, and BLM anticipates many more wells can be plugged under this industry-funded program. Control of point sources (either flowing wells or springs) by the BLM at various locations has reduced approximately 8,400 tons/year of salt discharge, and non-point source salinity control measures have been completed which control 25,000 tons/year. Flowing wells and springs continue to be controlled at various locations. It is estimated that another 5,600 tons of salt reduction can be accomplished at known point sources. Combined, all of the BLM salinity control measures (units underway and/or identified as potential, including well plugging and non-point sources) will prevent 88,600 tons of salt from entering the Colorado River system. The onshore oil and gas program is one of the major mineral leasing programs for the Department of the Interior. At the end of Fiscal-Year 1995, there were 19,000 leases in production status. For Tribal lands, the BLM is also responsible for operational management oversight of 4,200 producing leases, drilling supervision on non-producing leases, and advising the Bureau of Indian Affairs, Tribal officials, and allottees concerning leasing matters. Interest in oil and gas activity in the Colorado River Basin is widespread with the exception of Arizona. In the San Juan Basin, BLM has continued to assess oil and gas well-plugging opportunities which were identified at the conclusion of the interagency study of Navl\io aquifer salinization (Aneth-Ismay oil field). In the Aneth area, there are several flowing wells for which BLM has mineral responsibility. Each of these wells is high risk because of the past use of dynamite and other temporary measures. Currently, the Fannmgton District has not identified any funds to plug these wells. During the past three years there have been 15 wells which were abandoned by a failing oil field operator in the San Juan Basin. Two were plugged by the State of New Mexico; five by the BLM; and the remaining eight were plugged by Tenneco who bought the leases following abandonment. The ml\ior concern addressed by these pluggings was underground salt water and oil contaminated fresh water, and discharges to the San Juan River. Neither the hidden salt 4-7