Klineline Bridge, also known as Salmon Creek Bridge, on Highway 99 is not what it used to be when originally constructed in 1928. The bridge has a history of requiring extensive repairs after flooding events. This includes rebuilding the bridge after a partial collapse in the mid 50s. Portions of the structure are 80 years old.
Highway 99 was originally the primary north-south route for inland vehicle travel from Seattle to Southern California. Interstate 5 ultimately replaced this route in the 1960s. Washington Department of Transportation transferred the highway and the bridge to county control in the 1970s.
