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Fremont Bridge (Portland, Oregon)

1973 establishments in OregonBridges completed in 1973Bridges in Portland, OregonBridges of the United States Numbered Highway SystemBridges on the Interstate Highway System
Bridges over the Willamette RiverEliot, Portland, OregonGirder bridges in the United StatesInterstate 5Northwest District, Portland, OregonOverlook, Portland, OregonPearl District, Portland, OregonRoad bridges in OregonSteel bridges in the United StatesTied arch bridges in the United StatesU.S. Route 30Use mdy dates from May 2015
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The Fremont Bridge is a steel tied-arch bridge over the Willamette River located in Portland, Oregon, United States. It carries Interstate 405 and US 30 traffic between downtown and North Portland where it intersects with Interstate 5. It has the longest main span of any bridge in Oregon and is the second longest tied-arch bridge in the world (after Caiyuanba Bridge across the Yangtze River, China). The bridge was designed by Parsons, Brinckerhoff, Quade and Douglas, and built by Murphy Pacific Corporation.The bridge has two decks carrying vehicular traffic, each with four lanes. The upper deck is signed westbound on US 30 and southbound on I-405. The lower deck is signed eastbound on US 30 and northbound on I-405.

Excerpt from the Wikipedia article Fremont Bridge (Portland, Oregon) (License: CC BY-SA 3.0, Authors, Images).

Fremont Bridge (Portland, Oregon)
North Randolph Avenue, Portland Eliot

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N 45.5377083 ° E -122.6825027 °
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Fremont Bridge

North Randolph Avenue
97227 Portland, Eliot
Oregon, United States
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West Side CSO Tunnel
West Side CSO Tunnel

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.