Ak-Chin - Akimel O'odham, Ak-Chin - Tohono O'odham, Ak-Chin - Hia-Ced O'odham


Ak Chin Indian Community of the Maricopa (Ak Chin) Indian Reservation


Ak-Chin Water Rights Settlement


Maricopa Indian Reservation


Maricopa Indian Reservation




Lower Colorado Region

Hydrologic Unit Code (HUC)

Lower Colorado

Document Type

Post-settlement agreement


United States

Publication Date



Agreement: An Agreement in Principle to Revise Ak-Chin 1978 Water Settlement (Sep. 23, 1983). An agreement for revising water settlement between the Ak-Chin and US to amend the 1978 Act (PL 95-328). The goal of the Agreement is to secure federal legislation to ratify a revised Settlement and provide authorization for appropriations to implement the Settlement. The Agreement provides 15M for an interim water supply replacing an earlier US commitment to develop a well field on nearby federal lands. Ak-Chin alone has the determination and responsibility for the use of these monies. The US will also provide a 3.5M grant for economic development, and 25.3M in grants for agricultural development and flood protection. Permanent supplies will be made through CAP by 1988. If the US fails to perform, damages are based on replacement costs of water. US will pay all OM&R costs. Provisions are made for amounts of delivered water in dry, normal and wet years as well as maximum flow rates. Principles of force majeure apply.


1983 Agreement to amend 1978 Act. (5 pages)

Permanent URL


Article Location


To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.