Navajo-Gallup Water Supply Project Amendments Act of 2025

Updates and expands a major tribal and regional drinking water project, sets a new official cost estimate, and creates long‑term trust and construction funds to finish and operate the system. It also clarifies service areas in New Mexico and Arizona, contract and land‑into‑trust rules, and tax treatment for project‑related activities.

It establishes new settlement trust funds for the Navajo Nation and the Jicarilla Apache Nation, including a $250 million operations fund, and a Deferred Construction Fund to help cover construction when appropriations lag. It allows up to 2,000 acre‑feet per year of non‑Project water to Navajo communities in Utah under strict conditions, without new federal costs or obligations for New Mexico.