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Bridge conditions in Allegheny County, Pennsylvania

1,296 inventoried bridges · 120 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Allegheny County tracks close to typical: 120 of its 1,296 inventoried bridges (9.3%) are rated poor, against a national rate of about 7%.

120 of the 1,296 bridges in Allegheny County, Pennsylvania, are rated in poor condition (9.3%) in the 2025 National Bridge Inventory, as of August 20, 2026.
388 bridges (29.9%) are rated good and 788 (60.8%) fair.
The median Allegheny County bridge was built in 1968.
The busiest poor-rated bridge is Parkway East over Old Wm Penn Hwy Leak Run (built 1962), carrying about 52,457 vehicles a day.

Good 29.9% · Fair 60.8% · Poor 9.3% of 1,296 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
Parkway East over Old Wm Penn Hwy Leak Run	1962	52,457	Poor
Mcknight Rd over Babcock Blvd Girdys Run	1946	50,212	Poor
Pa Turnpike (I-76) over Plum Creek	1952	38,689	Poor
Pa Tpk (I-76) over T-911	1952	38,689	Poor
Kennywood Blvd over Union RR Thompson Run	1928	22,325	Poor
Blvd of the Allies over CSX RR & Bike Trail	1938	21,211	Poor
N Ave&brighton Rd over N-s Rr-allegheny Park	1905	21,000	Poor
Panther Hollow Rd over Overlook Drive	1988	21,000	Poor
Connor Rd over Pat Trolley # 9830	1983	20,817	Poor
Ramp A Tarentum Br over 4TH Ave Rampd NS RR	1952	18,420	Poor
Mckeesport Blvd over Union Railroad	1960	18,051	Poor
Old William Penn over Thompson Run	1924	16,904	Poor
Painters Run Rd over Painters Run	1955	15,049	Poor
South Negley Av over N-s RR & Pat Ebusway	1924	15,000	Poor
Eighth Ave over Homestead Run	1940	13,386	Poor
Brighton Heights over Verner Avenue	1930	13,100	Poor
Beaver Grade Rd over Montr Trlwy & Montour R	1960	12,698	Poor
SR 0050 EB WB over Pgh & Ohio Railway	1965	12,456	Poor
Mcardle Rdwy Rd over Sycamore Street	1983	11,000	Poor
Mcardle Rdwy Rd over Hillside	1929	11,000	Poor
Herron Av over Nsrc CSX & Busway	1980	10,900	Poor
Ramp S over Ramp R 02266 Rps. Forbes	1952	10,761	Poor
Broadway Av over Dirty Camp Run	1929	10,576	Poor
Clinton Ave over N. Br. of Robinson Run	1942	10,401	Poor
Summit Park Drive over Montour Trail & Run	1989	10,000	Poor
Rp B From W Carson over SR 0837 NB SB	1959	9,038	Poor
Maple Av over Monroeville Avenue	1964	8,563	Poor
Kenmawr Ave Rmp Rd over Fleet Street	1951	8,381	Poor
Larimer Av over Washington Blvd (rt 8)	1912	8,000	Poor
Saltsburg Rd over Plum Creek	1957	7,708	Poor
Universal Rd over Plum Creek Upper Branch	1982	7,662	Poor
Maple Spring Dr over Catfish Run	1936	6,959	Poor
SR 8 NB over RT.28 Railroad Local St.	1960	6,859	Poor
E Liberty(sb) Bl over Pedestrian Walkway	1968	6,635	Poor
Wible Run Rd over Wible Run Creek	1987	6,583	Poor
Twenty Eighth St over N-s RR /pat/sassafras St	1931	6,500	Poor
Glassport Road over Wylie Run	1905	6,411	Poor
Mcclaren Road over Branch of Montour Run	1948	6,349	Poor
Mcclaren & Main St over Branch Montour Run	1948	6,349	Poor
Ramp R over Ramp S E F and Brady St	1956	6,310	Poor
River Av over Three Rivers Heritage Tr	1939	6,000	Poor
Frazier St over Csx/av RR Saline St	1915	6,000	Poor
Ramp-e to 79 NB over Nev. Is. Ramp to NB 79	1972	5,865	Poor
Swindell Br over I279 Hov Ramp G East St	1930	5,700	Poor
Ramp A over Adj. West Carson Street	1959	5,353	Poor
Allegheny River Bl over Plum Creek	1937	5,300	Poor
Mall Entrance over Business 22	1970	5,242	Poor
Wall Av over Dirty Camp Run	1900	5,000	Poor
Jacks Run Rd over SR0279	1986	4,631	Poor
Monongahela Road over Beckets Run	1915	4,603	Poor
L.dr.crk.valley Rd over Little Deer Creek	1940	4,584	Poor
Lincoln Av over Girtys Run	1911	4,500	Poor
Grant Avenue over Girtys Run	1914	4,500	Poor
Lincoln Av over Girtys Run	1915	4,000	Poor
Washington Av over N-s RR Waverly Ave Pat	1907	4,000	Poor
West Carson St over Chartiers Creek	1925	3,756	Poor
Mclaughlin Run Rd over Mclaughlin Run	1900	3,740	Poor
Streets Run Road over Streets Run	1980	3,628	Poor
Ltl Deer Creek Rd over Little Deer Creek	1939	3,495	Poor
Grant St over Robinson Run	1980	3,469	Poor
Main Street over Montour Run	1950	3,416	Poor
Bakerstown Rd over Little Bull Creek	1900	3,323	Poor
Ramp-two Rd over CSX (3RIV)& Pacific Ave	1949	3,300	Poor
Presto Sygan Road over Branch Millers Run	1942	3,268	Poor
Steen Rd over Chartiers Crk Flood Chan	1972	3,215	Poor
Clinton Rd over Br.north Br.robinson Run	1953	3,058	Poor
Northgate Dr over Brush Creek	1929	3,000	Poor
Elizabeth St over CSX RR Gloster St	1900	3,000	Poor
Ramp H over Cliff Street	1935	2,619	Poor
Trumbull Dr over W & Le Railroad	1956	2,500	Poor
Ft Duq to 10 St over Ramp D & Alleg. River	1968	2,134	Poor
Milltown Road over Bodines Run	1936	2,080	Poor
Spring Hill Rd over N-s Rr/r-r St/creek	1915	2,002	Poor
Frey Rd over Thompson Run	1906	1,997	Poor
Buena Vista Rd over Wildcat Run	1938	1,985	Poor
Santiago Road over Montour Run	1955	1,952	Poor
Baileys Run Rd over Days Run	1890	1,899	Poor
Pineview Drive over Gillespie Run	1930	1,747	Poor
Lowrie St over Rialto Street	1900	1,650	Poor
Killarney Dr over Saw Mill Run	1955	1,500	Poor
Shaler St over Saw Mill Run Creek	1900	1,350	Poor
East Main Street over Chartiers Creek	1934	1,200	Poor
Ramp NO.1 Rd over CSX RR (3 River Railway)	1945	1,138	Poor
Cochrans Mills Rd over Lick Run Creek	1901	1,115	Poor
Pleasantville Road over Little Bull Creek	1972	1,033	Poor
Klopfer St over Girtys Run	1915	1,000	Poor
Coroapolis Imperia over Mcclarens Run	1940	944	Poor
Abers Creek Rd over Abers Creek	1893	850	Poor
Old Freeport Road over Sycamore Run	1982	825	Poor
Mission St over Gomer and Greely Streets	1939	650	Poor
Mission St over South 21ST Street	1939	650	Poor
Pangburn Hollow Rd over Perry Mill Run	1979	582	Poor
Penneman Drive over Fallen Timber Run	1951	500	Poor
Clearview Rd over Gourdhead Run	1930	500	Poor
Cavitt Rd over Abers Creek	1987	500	Poor
Maple Avenue over N Charles Street	1929	400	Poor
Booker St over Pucketa Creek	1965	366	Poor
Milroy St over I-279(LR 1021)NB Sb&hov	1986	300	Poor
Main St over Robinson Run	1920	300	Poor
California Hollow over Montour Run	1930	300	Poor
Old Williampenn Hw over Thompson Run Creek	1900	300	Poor
Ella Hollow Rd over Br.beckets Run	1926	282	Poor
Mill St over Bull Creek	1989	250	Poor
T717 Donnelleville over Little Bull Creek	1920	221	Poor
Penn Oak Street over Fallen Timber Run	1948	200	Poor
N-park Ice Rink Rd over Pine Creek North Fork	1965	192	Poor
Thompson Rd over Bull Creek	1894	155	Poor
Taylor Ave over Dirty Camp Run	1910	100	Poor
Creek St over Whitaker Creek	1993	75	Poor
Pink House Rd over Little Sewickley CR SB	1920	51	Poor
Corley St over Streets Run Creek	1951	50	Poor
Fremont St over Girtys Run	1911	50	Poor
Calera St over Streets Run Creek	1931	47	Poor
Timberland Av over Saw Mill Run Creek	1909	30	Poor
Bridge St. over Thoms Run	1990	25	Poor
Alexander St over Saw Mill Run	1924	20	Poor
Old Paintersrun Rd over Painters Run	1899	5	Poor
Hans Rd over Robinson Run N Branch	1945	–	Poor
Ansonia Pl over Saw Mill Run	1925	–	Poor
Versailles Av over Ravine Street	1972	–	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Penn Linc Pw over Buswy Arch Bell Poc RR	1952	99,372	Fair
Penn Linc Pw over SR50 Wle RR Chartiers Ck	1950	99,372	Fair
Penn Lincoln Py over Campbells Run	1972	96,254	Fair
Parkway West over Campbells Run Road	1973	96,254	Good
SR 0279 NB SB over Suffolk St.	1987	88,452	Fair
Penn Lincoln Pw over Whiskey Run Bell Rd	1953	87,163	Fair
376 Eb-wb over Poplar Avenue	1952	87,163	Good
Parkway West over Saw Mill Run	1952	86,514	Fair
Penn Lincoln Pkwy over Banksville Rd. S.B.	1953	85,962	Good
I-376 over CSX RR Swineburn Frazier	1951	85,678	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

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