Building the world’s first buoyant gravity sewer – Lake Oswego, Ore.
Lake Oswego, Ore., replaced an undersized, seismically vulnerable interceptor sewer in a popular lake with a nearly 2-mile-long buoyant pipeline held beneath the surface by flexible wire rope tethers.
Lake Oswego, Ore., replaced an undersized, corroding and seismically vulnerable pile-supported interceptor sewer in a popular lake with new infrastructure that includes a nearly 2-mile reach of buoyant high-density polyethylene pipeline held beneath the lake surface by flexible wire rope tethers. It is the world’s first buoyant gravity sewer, and it received the 2012 Grand Prize for Design from the American Academy of Environmental Engineers in the 2012 Excellence in Environmental Engineering Awards program in April.
Read more and watch a video about the project in "Innovative wastewater pipe resolves lake's environmental problems."
