Conducting work in streams, rivers, lakes or wetlands within a Reservation generally requires a permit issued by the environmental office of the Tribe. Examples of these include the Shoreline Protection Act 64A application (Confederated Salish and Kootenai Tribes of the Flathead Nation), and the Aquatic Lands Protection Ordinance 90-A (Blackfeet Nation). Each Tribe has its own process and requirements, and should be consulted directly for specifics. In general, Tribal permitting requirements mirror state and federal permits.
Contacts can be found by clicking the following link: Bureau of Indian Affairs