Navajo-Gallup Water Supply Project Amendments Act of 2025

This bill amends the Navajo-Gallup Water Supply Project to expand water delivery to additional Navajo Nation communities in New Mexico and Arizona, and to the Jicarilla Apache Nation. It establishes a Deferred Construction Fund to manage costs for project facilities that may be deferred, with specific rules for how these funds can be used. The bill increases authorized funding to $2.175 billion through fiscal year 2029 and updates tax rules for project facilities, clarifying that construction, operation, and maintenance on trust land will be subject to Navajo Nation taxation. It also modifies trust funds related to water rights and operations, including a new deadline for funding deposits. The primary beneficiaries are Navajo Nation and Jicarilla Apache Nation communities that will gain access to the expanded water supply.