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Oregon-Washington Columbia River Boundary Compact

The purpose of this compact is to fix with precision by reference to stations of longitude and latitude the boundary between the States of Oregon and Washington from one marine league due west of the mouth of the Columbia River to the most easterly point at which the 46th parallel of north latitude crosses said river, at which point the river ceases to form the boundary between the two states.
Category: Boundaries

Member States

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State Citation Year Of Joinder
Oregon ORS 186.510, 186.520 1957
Washington RCW 43.58.050 et seq. 1957