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It receives and stores overflow from the combined sewer system before it can reach the Willamette River. The main tunnel is 14 feet (4.3 m) in diameter and 3.5 miles (5.6 km) long for a capacity of 2,850,000 cubic feet (81,000 m 3) and connects to dozens of smaller sewer overflow interceptors along the west side of the Willamette River.
The East Side tunnel was the largest sewer construction project ever undertaken by the City of Portland. A contractor, Kiewit-Bilfinger Berger (KBB), used a tunnel boring machine that was 300 feet (91 m) long and had a cutting head that was 25 feet (7.6 m) in diameter. In addition to the tunnel and the pipe, the project involved building seven ...
The wastewater is collected by a vast network of more than 800 miles (1,300 km) of sewer lines and 39 pump stations and routed to one of four treatment plants—Durham, Rock Creek, Hillsboro and Forest Grove. Ten percent of the wastewater treated by Clean Water Services is used for irrigation and in area wetlands during the summer months. [14]
The city of Portland, Oregon, is known for having a large number of man-made reservoirs. Portland's reservoirs provide storage for drinking water from the Bull Run River. Portland is currently in the process of covering some of these reservoirs for continued use due to health concerns, but plans to keep most of them uncovered for their historic ...
Johnson Creek is a 25-mile (40 km) tributary of the Willamette River in the Portland metropolitan area of the U.S. state of Oregon.Part of the drainage basin of the Columbia River, its catchment consists of 54 square miles (140 km 2) of mostly urban land occupied by about 180,000 people as of 2012.
Here is what to know after President Joe Biden signed an executive order making Christmas Eve a federal holiday in 2024.