National Bridge Inventory: Pennsylvania Congressional District 17

  • Of the 1,966 bridges in the counties of this district, 196, or 10.0 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 258 bridges classified as structurally deficient in 2019.
  • Repairs are needed on 1,122 bridges in the district, which will cost an estimated $4.1 billion.
  • This compares to 1,125 bridges that needed work in 2019.
  • The state has committed $1.4 million in IIJA bridge formula funds to support 3 projects in the District.

County Year Built Daily Crossings Type of Bridge Location
Allegheny 1952 38,689 Rural Interstate Pa Turnpike (I-76) over Plum Creek
Allegheny 1985 25,048 Urban other principal arterial Washington Av over Chartiers Creek
Allegheny 1981 22,333 Urban other principal arterial Penn Av over East Busway,N-S RR
Allegheny 1938 21,211 Urban other principal arterial Blvd of The Allies over CSX RR & Bike Trail
Allegheny 1988 21,000 Urban other principal arterial Panther Hollow Rd overlook Drive
Allegheny 1905 21,000 Urban local road N Ave&Brighton Rd over N-S RR-Allegheny Park
Allegheny 1928 20,512 Urban other principal arterial Kennywood Blvd over Union RR, Thompson Run
Butler 1965 17,335 Urban collector SR3022 over Brush Creek
Allegheny 1983 16,993 Urban other principal arterial Connor Rd over Pat Trolley # 9830
Allegheny 1924 16,904 Urban local road Old William Penn over Thompson Run
Allegheny 1960 16,226 Urban other principal arterial Mckeesport Blvd over Union Railroad
Allegheny 1940 15,756 Urban other principal arterial Eighth Ave over Homestead Run
Allegheny 1952 15,651 Urban other principal arterial Tarentum Br,Rmp.B over Ns RR,4th Ave,Ross St
Allegheny 1952 15,618 Urban other principal arterial Ramp A,Tarentum Br over 4th Ave,Rampd, Ns RR
Allegheny 1955 15,049 Urban other principal arterial Painters Run Rd over Painters Run
Allegheny 1924 15,000 Urban minor arterial South Negley Av over N-S RR & Pat EBusway
Beaver 1969 13,444 Urban Interstate Beaver Valley Ex over SR 3016-Green Garden Rd
Allegheny 1940 13,386 Urban minor arterial Lincoln Hwy over Long Run
Allegheny 1930 13,100 Urban local road Brighton Heights over Verner Avenue
Beaver 1930 12,804 Urban other principal arterial Constitution Bl over Elkhorn Run
Allegheny 1937 12,715 Urban other principal arterial Jerome Street over 2027,CSX,Local,& Yough R
Butler 1949 12,678 Rural arterial SR 0422 EB&WB over Trib to Muddy Creek
Allegheny 1965 11,444 Urban other principal arterial SR 50 EB WB over Pgh & Ohio Railway
Allegheny 1960 11,211 Urban minor arterial Beaver Grade Rd over Mont R Trlwy & Montour R
Allegheny 1983 11,000 Urban minor arterial Mcardle Rdwy Rd over Sycamore Street
Type of Bridge Number of Bridges Area of All Bridges
(sq. meters)
Daily Crossings on All Bridges Number of Structurally Deficient Bridges Area of Structurally Deficient Bridges
(sq. meters)
Daily Crossings on Structurally Deficient Bridges
Rural Interstate 57 67,766 1,046,808 1 190 38,689
Rural arterial 25 34,599 255,291 1 103 12,678
Rural minor arterial 36 11,014 169,592 5 1,078 24,308
Rural major collector 63 20,878 95,631 5 5,298 10,791
Rural minor collector 50 13,212 48,888 8 1,153 5,678
Rural local road 286 42,134 103,899 48 5,576 9,714
Urban Interstate 268 536,249 6,710,654 5 6,325 32,261
Urban freeway/expressway 136 204,938 2,329,356 1 507 9,824
Urban other principal arterial 303 530,526 5,049,951 23 33,495 300,665
Urban minor arterial 259 206,807 1,970,656 27 17,018 176,015
Urban collector 148 69,702 666,107 13 4,604 56,939
Urban local road 335 154,353 954,665 59 18,142 183,413
Total 1,966 1,892,178 19,401,498 196 93,489 860,975
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 95 $102.3 382,791 21,723
Widening & rehabilitation 5 $4.3 22,761 1,445
Rehabilitation 816 $3,419.2 10,501,454 1,047,122
Deck rehabilitation/replacement 76 $240.3 712,089 74,770
Other structural work 130 $304.5 846,730 96,876
Total 1,122 $4,070.7 12,465,825 1,241,936

Data includes information for the following area(s): Allegheny County, Beaver County, Butler County

About the data:

Data and cost estimates are from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on July 3, 2023. 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 2022 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 repair cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient. Please note that for a few states, the number of bridges needing to be repaired can vary significantly from year to year, and reflects the data entered by the state.

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.

Compared to 6 in 2022

in the nation in % of structurally deficient bridges

1. West Virginia 20.0%
5. Maine 15.0%
6. Pennsylvania 13.0%
7. Puerto Rico 13.0%

Compared to 2 in 2022

in the nation in # of structurally deficient bridges

1. Iowa 4,558
2. Pennsylvania 3,022
3. Illinois 2,472

Compared to 17 in 2022

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 15.0%
20. Montana 6.0%
21. Pennsylvania 6.0%
22. North Carolina 6.0%
Full State Ranking


  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on July 3, 2023. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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