The Klamath River is in Oregon and has been declared to be a "person" by the Yurok Tribe:[1]
“ | [T]he Yurok Tribe declared rights of personhood for the Klamath River — likely the first to do so for a river in North America. A concept previously restricted to humans (and corporations), “rights of personhood” means, most simply, that an individual or entity has rights, and they’re now being extended to nonhumans. | ” |
A decline in salmon in the Klamath River has debatable causes, which include diversion of water for irrigation or even the global warming hoax.