To provide for the return of land to the Government of Guam, and for other purposes.

To extend energy conservation programs under the Energy Policy and Conservation Act through March 31, 2000.

To assist in the establishment of an interpretive center and museum in the vicinity of the Diamond Valley Lake in southern California to ensure the protection and interpretation of the paleontology discoveries made at the lake and to develop a trail system for the lake for use by pedestrians and nonmotorized vehicles.

To prescribe certain terms for the resettlement of the people of Rongelap Atoll due to conditions created at Rongelap during United States administration of the Trust Territory of the Pacific Islands, and for other purposes.

To amend the Dayton Aviation Heritage Preservation Act of 1992, and for other purposes.

To authorize the Secretary of the Interior, acting through the Bureau of Reclamation, to conduct a water resource feasibility study for the Little Butte/Bear Creek Subbasins in Oregon.

To establish the Colorado Canyons National Conservation Area and the Black Ridge Canyons Wilderness, and for other purposes.

To authorize the Commissioner of Reclamation to conduct a study to investigate opportunities to better manage the water resources in the Salmon Creek watershed of the upper Columbia River.

To authorize the Secretary of the Interior to establish the Sand Creek Massacre National Historic Site in the State of Colorado.

To extend the deadline for commencement of construction of certain hydroelectric projects in the State of West Virginia.