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. The casino is located in Coulee Dam, Washington and opened. 12 Tribes Colville Casinos has 3 casinos in Manson, Omak & Coulee Dam, WA. Visit us today for table games, concerts & much more! 12 Tribes Colville Casino Resort. Beautiful Hotel, Restaurants, Nightclubs, great gaming and more! [HOST] Highway 97, Omak, Washington colvillecasinos. Casino. [HOST] Highway 97; Omak, Washington Confederated Tribes of the Colville Reservation. 12 Tribes Lake Chelan Casino · Page · Casino · () · [HOST] 12 Tribes Omak Casino Hotel located in Omak, WA is our newest property. 12 Tribes Colville Casinos reopened today May 19 ; 12 Tribes Resort Casino US, Omak, WA ,() ; Coulee Dam Casino Birch Street, Coulee. The 12 Tribes Coulee Dam Casino is an Indian gaming casino owned by the Colville Confederated Tribes. It built a new. While other. . Featuring a 56, square foot gaming floor with + slots, table games, 2 restaurants. 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.