Mni Sose Intertribal Water Rights Coalition

Mission Statement

The Mni Sose Intertribal Water Rights Coalition's mission is to protect and defend the Winters Doctrine (reserved water rights) and other water rights of Indian Tribes in the Missouri River Basin, whether based on riparian or prior appropriation principles and/or recognized under treaty, federal law, international law, tribal law, or other local law in coordination and collaboration with member Tribes. The Coalition is organized and operated according to the requirements of the Coalition member Tribes and the United States regarding the existence and operations of non-stock, non-profit corporations.


Organizational Capabilities:

  • Direct Communication, including a computerized information network, with the Missouri River Basin Tribes.
  • Technical assistance to address tribal water resource problems and issues.
  • Provisions for a forum to allow Tribes and agencies to work cooperatively.
  • Capability of addressing governmental agencies' needs for services.
  • Interface with federal, state, public, and private agencies involved in water resource issues.
  • Up-to-date, centrally-located office in Rapid City, South Dakota.


Mni Sose Intertribal Water Rights Coalition
P.O. Box 2890
514 Mt. Rushmore Road
Rapid City, SD 57709-2890

Phone: (605) 343-6054
Fax: (605) 343-4722
E-mail:

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