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