National Bridge Inventory: Pennsylvania Congressional District 17
- Of the 1,957 bridges in the counties of this district, 288, or 14.7 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
- This is down from 414 bridges classified as structurally deficient in 2014.
- 121 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
- Repairs are needed on 1,124 bridges in the district, which will cost an estimated $2.2 billion.
|County||Year Built||Daily Crossings||Type of Bridge||Location|
|Allegheny||1928||42,061||Urban other principal arterial||Liberty Bridge over Mon R,I376,0837,2 Av,Arl|
|Allegheny||1952||38,689||Rural Interstate||Pa Turnpike (I-76) over Little Plum Cr|
|Allegheny||1942||32,150||Urban other principal arterial||Ardmore Bl over Falls Run|
|Allegheny||1950||27,314||Urban Interstate||Pa Tpk (I-76) over SR 19, US19|
|Butler||1970||26,326||Urban Interstate||Sr79 SB over T-311 N Boundary Rd|
|Allegheny||1951||25,754||Urban other principal arterial||Eliz. Br Sr51 over Sr837 21 CSX Ns Mon Ri|
|Allegheny||1985||25,212||Urban other principal arterial||Washington Av over Chartiers Creek|
|Butler||1970||24,599||Urban Interstate||SR 79 NB over Twp. Rd. 311 Boundary Rd|
|Allegheny||1932||24,350||Urban other principal arterial||Wm.Flynn Hw over West Branch Deer Creek|
|Allegheny||1984||22,792||Urban freeway/expressway||SR 28 SH over Lr 02276-Bull Creek Road|
|Beaver||1952||22,663||Rural Interstate||Pa Tpk (I-76) over Brush Creek|
|Allegheny||1926||22,462||Urban minor arterial||Ninth Street Br over Allegh Riv,10 St By-Pass|
|Allegheny||1942||21,311||Urban other principal arterial||SR 51 over Fallen Timber Run|
|Allegheny||1938||21,211||Urban other principal arterial||Blvd of The Allies over CSX RR & Bike Trail|
|Allegheny||1905||21,000||Urban local road||N Ave&Brighton Rd over N-S RR-Allegheny Park|
|Allegheny||1972||18,889||Urban minor arterial||Noblestown Road over Robinson Run|
|Allegheny||1962||17,850||Urban Interstate||Ramp H Rd. over Forbes,Diamond,& 6th Ave|
|Allegheny||1930||17,488||Urban other principal arterial||Ohio River Blvd over Spruce Run Cr.-Spruce St|
|Butler||1934||17,112||Urban other principal arterial||Sr08 over Glade Run|
|Allegheny||1983||16,041||Urban other principal arterial||Connor Rd over Pat Trolley # 9830|
|Allegheny||1952||15,494||Urban other principal arterial||Ramp A,Tarentum Br over 4th Ave,Rampd, Ns RR|
|Allegheny||1984||15,239||Urban minor arterial||Brownsville Rd over W&Le RR|
|Allegheny||1952||15,102||Urban other principal arterial||Tarentum Br,Rmp.B over Ns RR,4th Ave,Ross St|
|Allegheny||1955||15,049||Urban other principal arterial||Painters Run Rd over Painters Run|
|Allegheny||1910||15,000||Urban other principal arterial||Braddock Avenue over Norfolk Southern RR|
|Type of Bridge||Number of Bridges||Area of All Bridges
|Daily Crossings on All Bridges||Number of Structurally Deficient Bridges||Area of Structurally Deficient Bridges
|Daily Crossings on Structurally Deficient Bridges|
|Rural minor arterial||36||10,881||189,373||5||1,147||27,137|
|Rural major collector||62||21,227||95,301||8||5,918||12,941|
|Rural minor collector||48||13,944||40,242||13||2,638||10,098|
|Rural local road||286||42,045||100,227||70||8,474||30,717|
|Urban other principal arterial||290||512,981||4,879,044||33||59,667||468,289|
|Urban minor arterial||255||212,516||2,006,230||47||32,653||348,878|
|Urban local road||356||209,355||1,090,262||78||25,604||187,929|
|Type of Work||Number of Bridges||Cost to Repair
|Daily Crossings||Area of Bridges
|Widening & rehabilitation||10||$0.5||34,081||958|
|Other structural work||47||$70.0||374,722||47,236|
Data includes information for the following area(s): Allegheny County, Beaver County, Butler County
About the data:
Data from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), released March 15, 2019. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.
Effective January 1, 2018, FHWA changed the definition of structurally deficient as part of the final rule on highway and bridge performance measures, published May 20, 2017 pursuant to the 2012 federal aid highway bill Moving Ahead for Progress in the 21st Century Act (MAP-21). Two measures that were previously used to classify bridges as structurally deficient are no longer used. This includes bridges where the overall structural evaluation was rated in poor or worse condition, or where the adequacy of waterway openings was insufficient.
The new definition limits the classification to bridges where one of the key structural elements—the deck, superstructure, substructure or culverts, are rated in poor or worse condition. During inspection, the conditions of a variety of bridge elements are rated on a scale of 0 (failed condition) to 9 (excellent condition). A rating of 4 is considered “poor” condition.
Cost estimates have been derived by ARTBA, based on 2017 average bridge replacement costs for structures on and off the National Highway System, published by FHWA. Bridge rehabilitation costs are estimated to be 68 percent of replacement costs. A bridge is considered to need repair if the structure has identified repairs as part of the NBI, a cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient.
Bridges are classified by FHWA into types based on the functional classification of the roadway on the bridge. Interstates comprise routes officially designated by the Secretary of Transportation. Other principal arterials serve major centers of urban areas or provide mobility through rural areas. Freeways and expressways have directional lanes generally separated by a physical barrier, and access/egress points generally limited to on- and off-ramps. Minor arterials serve smaller areas and are used for trips of moderate length. Collectors funnel traffic from local roads to the arterial network; major collectors have higher speed limits and traffic volumes and are longer in length and spaced at greater intervals, while minor collectors are shorter and provide service to smaller communities. Local roads do not carry through traffic and are intended for short distance travel.