Washington dams | KNKX

Washington dams

Elaine Thompson / AP Images

The Chehalis River has flooded 18 times in the past 20 years, sometimes submerging Interstate 5 near Olympia. The local Flood Control Zone District is proposing a new dam to prevent extreme high water. A draft environmental impact statement is now out for public comment.  

Northwest residents are surrounded by thousands of dams, some in disrepair. And now the emergency at California’s Oroville Dam has sharpened interest in dam safety.

Seattle City Light

Seattle City Light has finalized a new 42-year license on its most productive hydroelectric dam. The agreement wraps up a process seven years in the making.

Boundary Dam sits on the Pend Oreille River in northeastern Washington. It rises to 340 feet tall, spanning a narrow canyon. 

"Oh it's awesome," said City Light's Barbara Greene. "Every time I go there, after 10 years, it's just awesome."

Washington Dept. of Ecology

OLYMPIA, Wash. – The Northwest is known for its big hydroelectric dams. But across the region there are also hundreds of smaller non-hydro dams. Some of them hold back water, but others retain dairy waste or sewage.

In Washington, the operators of these structures could soon pay more in annual fees to cover the cost of inspections.