Local and state tribal groups are supporting the Standing Rock Sioux tribe's opposition to the Dakota Access Pipeline.

Owned by Dallas-based Energy Transfer Partners, the $3.8 billion, 1,172-mile project would carry nearly a half-million barrels of crude oil daily from North Dakota's oil fields through South Dakota and Iowa to an existing pipeline in Patoka, Illinois, where shippers can access Midwest and Gulf Coast markets.

• The Tohono O'Odham Tribe sent a letter Sept. 2 to President Obama and the U.S. Army Secretary's office in opposition to the pipeline. The Army Corps of Engineers has issued a permit for the pipeline which the Standing Rock Sioux are challenging in court.

• The Pascua Yaqui Tribal Council passed a resolution on Wednesday in support of the Sioux and in opposition to the pipeline.

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• The Intertribal Association of Arizona has passed a resolution opposing the pipeline. The association is the political arm of the Intertribal Council of Arizona, a non-profit group that provides programs and services for 21 Arizona tribes.

• A march in support of the Dakota Sioux is scheduled for Thursday night, Sept. 8, from 6-8 p.m. from Cardinal Park on Tucson's southwest side to the San Xavier Mission. It is sponsored by the Pascua Yaqui Festival of the Arts.