RCW 85.06.350: Public lands subject to assessment—Rights and liabilities of public corporations.

All state, county, school district or other lands belonging to other public corporations requiring drainage shall be subject to the provisions of this chapter, and such corporations, by and through the proper authorities, shall be made parties in all proceedings herein affecting said lands, and shall have the same rights as private persons, and their lands shall be subject to the right of eminent domain the same as the lands of private persons or corporations.