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Historic Bridges: Multnomah County, Oregon

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.
Total Bridges Found: 12

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Broadway Over Willamette River and Various Streets and Railroad in Portland: Multnomah County, Oregon, United States
Metal 12 Panel Rivet-Connected Baltimore Through Truss, Movable: Double Leaf Bascule (Rall) and Approach Spans: Metal 11 Panel Rivet-Connected Pennsylvania Through Truss, Fixed
Length: 1742 ft. Main Span: 278 ft. Roadway: 45.6 ft. Main Spans: 1
Built 1913 By: Pennsylvania Steel Company of Steelton, Pennsylvania and Ralph Modjeski
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Burnside Street Over Willamette River and Various Streets and Railroad in Portland: Multnomah County, Oregon, United States
Metal Rivet-Connected Pratt Deck Truss, Movable: Double Leaf Bascule (Strauss Trunnion) and Approach Spans: Metal Rivet-Connected Double-Intersection Warren Deck Truss, Fixed
Length: 2807 ft. Main Span: 213 ft. Roadway: 68 ft. Main Spans: 1
Built 1926 By: Pacific Bridge Company of Portland, Oregon and Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago, Illinois and Gustav Lindenthal
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I-405 Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal Continuous 28 Panel Tied Solid Ribbed Through Arch, Fixed
Length: 7340 ft. Main Span: 1255.3 ft. Roadway: 136.2 ft. Main Spans: 3
Built 1973 By: American Bridge Company of New York, New York and Parsons Brinckerhoff of New York, New York
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Hawthorne Avenue Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal 11 Panel Rivet-Connected Parker Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal 11 Panel Rivet-Connected Parker Through Truss, Fixed
Length: 1383 ft. Main Span: 251 ft. Roadway: 43.6 ft. Main Spans: 1
Built 1910 By: Pennsylvania Steel Company of Steelton, Pennsylvania and Waddell and Harrington
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I-5 Over Columbia River in Portland and Vancouver: Multnomah County, Oregon and Clark County, Washington, United States
Metal 11 Panel Rivet-Connected Parker Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal 22 Panel Rivet-Connected Pennsylvania Through Truss, Fixed
Length: 3538 ft. Main Span: 531.4 ft. Roadway: 38 ft. Main Spans: 1
Built 1917 By: American Bridge Company of New York, New York and Waddell and Harrington
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North Lombard Street (US-30 Bypass) Over Railroad (BNSF, Portsmouth Cut) in Portland: Multnomah County, Oregon, United States
Metal Rivet-Connected Warren Deck Truss, Fixed
Length: 340 ft. Main Span: 91 ft. Roadway: 40 ft. Main Spans: 3
Built 1909 By: Unknown and Ralph Modjeski
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I-5 Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal Cantilever 14 Panel Multiple-Type-Connected Warren Deck Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Length: 5280 ft. Main Span: 440 ft. Roadway: 114 ft. Main Spans: 3
Built 1966 By: American Bridge Company of New York, New York and Ivan D. Merchant
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Morrison Street Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal Rivet-Connected Pratt Deck Truss, Movable: Double Leaf Bascule (Fixed Trunnion) and Approach Spans: Metal 8 Panel Rivet-Connected Pratt Deck Truss, Fixed
Length: 3125 ft. Main Span: 285 ft. Roadway: 68.6 ft. Main Spans: 1
Built 1958 By: American Bridge Company of New York, New York and Sverdrup and Parcel of St. Louis, Missouri
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US-26 Over Willamette River and Various Streets and Railroad in Portland: Multnomah County, Oregon, United States
Metal Cantilever 40 Panel Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed and Approach Spans: Metal 24 Panel Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed
Length: 3653 ft. Main Span: 535 ft. Roadway: 43 ft. Main Spans: 3
Built 1926 By: Booth and Pomeroy of Portland, Oregon and American Bridge Company of New York, New York and Gustav Lindenthal
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Tacoma Street Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal Continuous 22 Panel Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed and Approach Spans: Concrete Deck Girder, Fixed
Length: 1972 ft. Main Span: 300 ft. Roadway: 30.8 ft. Main Spans: 4
Built 1925 By: Gilpin Construction Company of Portland, Oregon and Gustav Lindenthal and Ira G. Hedrick
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US-30 Bypass (Philadelphia Avenue) Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Rivet-Connected Warren Deck Truss, Fixed
Length: 3608.8 ft. Main Span: 1207 ft. Roadway: 40 ft. Main Spans: 3
Built 1931 By: Wallace Bridge and Structural Steel Company of Seattle, Washington and Robinson and Steinman
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OR-99W and Railroad (Southern Pacific) Over Willamette River in Portland: Multnomah County, Oregon, United States
Metal 7 Panel Rivet-Connected Pratt Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal 11 Panel Rivet-Connected Pratt Deck Truss, Fixed
Length: 800 ft. Main Span: 211 ft. Roadway: 50 ft. Main Spans: 1
Built 1912 By: American Bridge Company of New York, New York and Waddell and Harrington

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