Environmental Services completed construction on the West Side Big Pipe in 2006. The 14-foot diameter, 3.5-mile tunnel extends from SW Clay Street and SW Naito Parkway north to the Swan Island CSO pump station.
The West Side Big Pipe connects to the Southwest Parallel Interceptor at SW Clay Street. The interceptor extends nearly three miles from Clay to SW Taylors Ferry Road.
Swan Island Pump Station
The Swan Island pump station is 160 feet deep and 124 feet wide. It can pump up to 220 million gallons a day through the Peninsular Force Main and on to the Columbia Boulevard Wastewater Treatment Plant.
A River Renewed
Watch the CSO video A River Renewed narrated by Walter Cronkite.