Indian Reservation Roads Program

The Indian Reservation Roads (IRR) Program addresses transportation needs of tribes by providing funds for planning, designing, construction, and maintenance activities for all public roads. The program is jointly administered by the Federal Highway Administration’s Federals Lands Highway Office and the BIA, Division of Transportation, in accordance with an interagency agreement.

The Indian Reservation Roads are public roads which provide access to and within Indian reservations, Indian trust land, restricted Indian land, and Alaska native villages. Approximately 29,000 miles are under the jurisdiction of BIA and tribes and another 73,000 miles are under State and local ownership. The IRR program funds can be used for any type Title 23 transportation project providing access to or within Federal or Indian lands and may be used for the State/local matching share for apportioned Federal-aid Highway Funds.

The IRR Inventory is a comprehensive database of all transportation facilities eligible for IRR Program funding by tribe, reservation, BIA agency and region, Congressional district, State, and county. Other specific information collected and maintained under the IRR Program includes classification, route number, bridge number, current and future traffic volumes, maintenance responsibility, and ownership. 

For more information on the IRR program, please visit the BIA website at:
Sink Road Bridge and Canoe Ramp details
Sink Road Bridge BCA analysis
Sink Road Bridge provisions
Tribal Transportation Improvement Plan