From 1885 till now, dams keep played an important role in Pacific Northwest. However, despite providing transportation convenience and electricity affecting the salmon population, they greatly impacted the salmon population. Nowadays, people standing for different parties are arguing whether the dams should be removed to restore the salmon population. Currently, a solid plan for dam removal has been proposed by Congressman Simpson. And it’s barely a start, further discussions will become more intensified and require an urgent environmental political response.