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