As an example, here is what is said by Oregon & Washington about the border between them. This was ratified by both states in a compact. It looks like they sw

As an example, here is what is said by Oregon & Washington about the border between them. This was ratified by both states in a compact. It looks like they switched from less precise definitions like "the varying center of the main channel of the Columbia River" to a list of precise coordinates. Washington: https://app.leg.wa.gov/rcw/default.aspx?cite=43.58&full=true https://app.leg.wa.gov/rcw/default.aspx?cite=43.58&full=true Oregon: https://oregon.public.law/statutes/ors_186.520 https://oregon.public.law/statutes/ors_186.520