The casino is located in Coulee Dam, Washington and opened. The Mill Bay Casino in Manson, Washington is owned by the Confederated Colville Tribe and is located on the northern shores of Lake Chelan. The Colville Tribe already operates three casinos in north-central Washington, which include Omak, Grand Coulee and Chelan. 12 Tribes Colville Casinos has 3 casinos in Manson, Omak & Coulee Dam, WA. [HOST] Highway 97; Omak, Washington Confederated Tribes of the Colville Reservation. . 12 Tribes Omak Casino Hotel, located in Omak, offers + machines, 8 table games, two lounges, two high-end restaurants, a 57, square foot casino floor and. Casino. 12 Tribes Lake Chelan Casino · Page · Casino · () · [HOST] 12 Tribes Omak Casino Hotel located in Omak, WA is our newest property. The 12 Tribes Coulee Dam Casino is an Indian gaming casino owned by the Colville Confederated Tribes. Beautiful Hotel, Restaurants, Nightclubs, great gaming and more! [HOST] Highway 97, Omak, Washington colvillecasinos. While other. Featuring a 56, square foot gaming floor with + slots, table games, 2 restaurants. 12 Tribes Colville Casinos reopened today May 19 ; 12 Tribes Resort Casino US, Omak, WA ,() ; Coulee Dam Casino Birch Street, Coulee. It built a new. Visit us today for table games, concerts & much more! 12 Tribes Colville Casino Resort.