Reaches a final water rights settlement for the Navajo Nation, the Hopi Tribe, and the San Juan Southern Paiute Tribe in northeastern Arizona. It creates tribal trust funds, assigns and manages Colorado River water for the Tribes, and authorizes a major pipeline to deliver safe drinking water.

It sets conditions for when the settlement becomes legally enforceable, authorizes limited waivers and releases of certain water-related claims, allows regulated leasing and exchanges of some tribal water, confirms tribal and allottee water rights held in trust by the United States, and establishes a new San Juan Southern Paiute Reservation. The law details funding, construction, environmental compliance, water accounting rules, and long‑term operations and reporting.