RCW 35.21.250: Streets and alleys over first-class tidelands—Control of.

All streets and alleys, which have been heretofore or may hereafter be established upon, or across tide and shore lands [tidelands and shorelands] of the first class shall be under the supervision and control of the cities within whose corporate limits such tide and shore lands [tidelands and shorelands] are situated, to the same extent as are all other streets and alleys of such cities.