A bill amending the Act of July 28, 1978 (Public Law 95-328) relating to the water rights of the Ak-Chin Indian Community and for other purposes.

[AI summary unavailable — showing source text] Amends Federal law relating to the water rights of the Ak-Chin Indian community to direct the Secretary of the Interior (the Secretary) to deliver annually a permanent water supply to a certain part of the Ak-Chin Indian Reservation starting not later than January 1, 1988. Reduces the amount of such water supply from 85,000 to 75,000 acre-feet of surface water suitable for agricultural use. Requires the Secretary to make additional deliveries of specified acre-feet of water as requested by the Community in any year in which sufficient surface water is available. Conditions such requirement upon the Secretary's determination that sufficient capacity is available for such additional delivery. Specifies a minimum annual permanent water delivery in times of shortage. Requires the Secretary to construct and maintain water delivery systems at no cost to the community. Identifies the water sources from which the permanent water delivery shall be supplied. Reduces the annual beneficial consumptive use of Colorado River water on the Yuma Mesa Division of the Gila project from 300,000 acre-feet to 250,000 acre-feet. Restricts the use of such water to the irrigation of 40,000 acres in the Yum…