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- West_Side_CSO_Tunnel abstract "The West Side Combined Sewer Overflow Tunnel (also West Side Big Pipe) is a tunnel in Portland, Oregon, United States. 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 m3) and connects to dozens of smaller sewer overflow interceptors along the west side of the Willamette River.The tunnel receives flows that might otherwise reach the river. Instead, the CSO tunnel transports them to the Swan Island Pump Station. Portland's 1930s sewer design combined street and surface runoff with sewage in a common system that was overwhelmed during heavy precipitation. The original system handled overflows by sending excess flow into the river.The tunnel is 120 to 160 feet (37 to 49 m) below ground level. It passes under the Willamette River between the NW Nicolai Street shaft (45.54072°N 122.69751°W / 45.54072; -122.69751 (Nicoli shaft)) to the confluent vertical shaft on Swan Island (45.55302°N 122.69565°W / 45.55302; -122.69565 (Swan Island confluent shaft)), which also receives the East Side Big Pipe. From Nicolai, it travels roughly south close to Front Avenue. There are vertical shafts at Upshur (45.53643°N 122.68642°W / 45.53643; -122.68642 (Upshur shaft)), Ankeny (45.52234°N 122.66992°W / 45.52234; -122.66992 (Ankeny shaft)), and Clay streets (45.51163°N 122.67530°W / 45.51163; -122.67530 (Clay Street shaft)). The Clay Street shaft receives the Southwest Parallel Interceptor, a 3-to-6-foot (0.91 to 1.83 m) pipeline which runs along the west Willamette shore for 3 miles (4.8 km) to Virginia Avenue and Taylors Ferry Road 45.47015°N 122.67240°W / 45.47015; -122.67240 (SW Parallel Interceptor south end).The project is a part of the Willamette River combined sewer overflow expansion program. Construction occurred from November 2002 to September 2006, and the project became fully operational in December 2006.A 20-year series of related CSO projects, including the West Side Big Pipe, culminated in late 2011 with completion of the East Side Big Pipe. The combined projects reduced the city's sewer overflows into the Willamette River by 94 percent and into the Columbia Slough by more than 99 percent. The total cost of the projects, about $1.4 billion, is being financed over time through additions to the Portland sewer rates. Almost no financial support for the projects came from state or Federal governments.".
- West_Side_CSO_Tunnel thumbnail Big_Pipe_4.JPG?width=300.
- West_Side_CSO_Tunnel wikiPageID "22095582".
- West_Side_CSO_Tunnel wikiPageRevisionID "577012358".
- West_Side_CSO_Tunnel hasPhotoCollection West_Side_CSO_Tunnel.
- West_Side_CSO_Tunnel subject Category:2006_establishments_in_Oregon.
- West_Side_CSO_Tunnel subject Category:Buildings_and_structures_in_Portland,_Oregon.
- West_Side_CSO_Tunnel subject Category:Tunnels_in_Oregon.
- West_Side_CSO_Tunnel point "45.54072 -122.69751".
- West_Side_CSO_Tunnel type Artifact100021939.
- West_Side_CSO_Tunnel type Building102913152.
- West_Side_CSO_Tunnel type BuildingsAndStructuresInPortland,Oregon.
- West_Side_CSO_Tunnel type Object100002684.
- West_Side_CSO_Tunnel type PhysicalEntity100001930.
- West_Side_CSO_Tunnel type Structure104341686.
- West_Side_CSO_Tunnel type Whole100003553.
- West_Side_CSO_Tunnel type YagoGeoEntity.
- West_Side_CSO_Tunnel type YagoPermanentlyLocatedEntity.
- West_Side_CSO_Tunnel type SpatialThing.
- West_Side_CSO_Tunnel comment "The West Side Combined Sewer Overflow Tunnel (also West Side Big Pipe) is a tunnel in Portland, Oregon, United States. It receives and stores overflow from the combined sewer system before it can reach the Willamette River.".
- West_Side_CSO_Tunnel label "West Side CSO Tunnel".
- West_Side_CSO_Tunnel sameAs m.05p77g4.
- West_Side_CSO_Tunnel sameAs Q7986497.
- West_Side_CSO_Tunnel sameAs Q7986497.
- West_Side_CSO_Tunnel sameAs West_Side_CSO_Tunnel.
- West_Side_CSO_Tunnel lat "45.54072".
- West_Side_CSO_Tunnel long "-122.69751".
- West_Side_CSO_Tunnel wasDerivedFrom West_Side_CSO_Tunnel?oldid=577012358.
- West_Side_CSO_Tunnel depiction Big_Pipe_4.JPG.
- West_Side_CSO_Tunnel isPrimaryTopicOf West_Side_CSO_Tunnel.
