SALEM, Ore. — A confederation of tribes in Oregon announced plans Tuesday to build a casino in the state capital, and draw in crowds of gamblers from Portland.The Confederated Tribes of Siletz Indians of Oregon said they hope to open the 140,000 square foot entertainment, gaming and hotel facility in 2021 on reservation property on the northern end of Salem, and that they want to partner with other tribes. The Siletz would need approval from the governor for a casino. The initial reaction from Gov. Kate Brown’s office indicated the Siletz will have to hedge its bet by getting the other eight federally recognized tribes in Oregon on board — and some already have casinos or have their own plans. “To date, Gov. Brown has not received any proposal that enjoys comprehensive tribal support,” Bryan Hockaday, Brown’s press secretary, said in an email. “Should Gov. Brown receive such a proposal, the discussion would focus on whether the proposed casino would be in the best interest of the tribes, and of the people of Oregon.”The Siletz said they expect to create 1,500 full-time jobs the first year of operation of the casino, which the tribe wants to build near Interstate 5 on the north side of Salem. They project $185.4 million in gross revenue in the first year of operation.