Interior Department to transfer 220 acres of tribal land into federal trust. Last week the federal Bureau of Indian Affairs officially notified the Ione Band of Miwok Indians of approval by the U.S. Read more New Sacramento-area Indian casino land approved by Fed Ap. Newsom signed a gaming compact with the Ione Band of Miwok Indians this week giving the tribe its final approval to build a new casino 30 miles southeast of Sacramento. Read more Ione Band casino receives final state approval, compact Aug-Ĭalifornia Gov. The Ione Band of Miwok Indians announced Thursday that Warner Gaming will partner with the tribe to develop a new casino in Plymouth, Amador County, California. News Headlines Ione Band of Miwok Indians signs developer for Plymouth casino project Octo. The other two are the Harrah's Northern California Casino in Ione and Jackson Rancheria Casino in Jackson. The Ione Band of Miwoks Casino will be the third casino in Amador County. There will be two dining venues, coffee bar and a sports bar. The casino will be located in Amador County along Highway 49 in Plymouth, California and feature Class III slot machines and table games. Ione Band Casino is an Indian gaming casino owned by the Ione Band of Miwoks.