Scour-Critical Bridges in Pennsylvania

Pennsylvania has 2,249 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.

How this ranking works

This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.

Bridge	County	Scour Rating	Daily Traffic	Condition
Pa Tpk(i-276)rp Ab over Sandy Run	Montgomery	3 — Serious	74,921	Good
SR 0081 & SR 8015 over Laurel Run	Luzerne	3 — Serious	66,529	Fair
Pa Tpk (i-476) over Towamencin Creek	Montgomery	3 — Serious	65,329	Good
SR 422(lr 793) over Schuy.river Service Rd.	Berks	3 — Serious	59,527	Fair
Pa 309 By-pass over Sandy Run / 3257-h10	Montgomery	3 — Serious	58,495	Fair
I-83; SR 0083 over Mill Creek	York	3 — Serious	54,739	Fair
Parkway East over Old Wm Penn HWY Leak Run	Allegheny	3 — Serious	52,457	Poor
Roosevelt Blvd. over Pennypack Crk;paths	Philadelphia	3 — Serious	52,330	Fair
Interstate 95 (nb) over Neshaminy CR & SR 2027	Bucks	3 — Serious	46,995	Fair
Interstate 95 (sb) over Neshaminy CR & Appl 276	Bucks	3 — Serious	44,629	Fair
SR 422(lr 146) over Monocacy Creek	Berks	3 — Serious	44,528	Fair
West Liberty AVE over Saw Mill Run	Allegheny	3 — Serious	42,292	Fair
Tr309 Cross Valley over Toby Creek	Luzerne	3 — Serious	41,421	Poor
Pa Turnpike (i-76) over Plum Creek	Allegheny	3 — Serious	38,689	Poor
I-78(LR 141) over Crosskill Creek	Berks	3 — Serious	37,481	Fair
Easton Road over Branch Neshaminy Creek	Bucks	3 — Serious	35,170	Poor
Beth.pk;w.end BLVD over Morgan Creek	Bucks	3 — Serious	35,087	Poor
Pa Tpk (i-76) over Jacobs Creek	Westmoreland	3 — Serious	34,232	Fair
Old Welsh Road over Pennypack Creek	Montgomery	3 — Serious	32,800	Poor
SR 78 (lr 141) over Mill Creek	Berks	3 — Serious	32,446	Fair
US 1 By-pass over W.branch Red Clay Creek	Chester	3 — Serious	32,115	Fair
E. Lancaster AVE over Branch Browns Run	Delaware	3 — Serious	31,662	Poor
RT 0008 NB SB over Pine Creek	Allegheny	3 — Serious	31,339	Fair
Grant Avenue over Wooden Bridge Run	Philadelphia	3 — Serious	30,410	Fair
Germantown Pike over Plymouth Creek / 3368-e4	Montgomery	3 — Serious	30,162	Fair
Bethlehem Pike over W. Br. Neshaminy Creek	Montgomery	3 — Serious	30,106	Poor
Easton Road over Pennypack Creek	Montgomery	3 — Serious	30,060	Fair
SR 0309 Tr 309 over Toby Creek	Luzerne	3 — Serious	29,878	Poor
SR 0309 Tr 309 over Toby Creek	Luzerne	3 — Serious	29,878	Poor
US 222 (lr 157) over Trib.to Moselem Creek	Berks	3 — Serious	29,775	Fair
State Road over Darby Creek	Delaware	3 — Serious	29,754	Poor
Pa Tpk (i-76) over Glades Creek	Somerset	3 — Serious	29,452	Fair
Township Line Road over Cobbs Creek	Delaware	3 — Serious	27,899	Poor
Pa 309(lr 153) over Saucon Creek	Lehigh	3 — Serious	27,279	Fair
Markley/elm Street over Stony Creek	Montgomery	3 — Serious	27,202	Poor
Route 100 over Manatawny Creek	Montgomery	3 — Serious	26,919	Fair
Ohio River Bl over Crows Run	Beaver	3 — Serious	26,289	Fair
Clairton BLVD over Lewis Run	Allegheny	3 — Serious	25,938	Fair
Pa 283 Eb; SR 0300 over Little Chiques Creek	Lancaster	3 — Serious	24,666	Fair
Pa Tpk (i-76) over Conewago Creek	Lebanon	3 — Serious	24,423	Fair
County Line Road over Southampton Creek	Bucks	3 — Serious	24,196	Fair
Swede Road over Branch Stony Cr/ 3255h08	Montgomery	3 — Serious	23,491	Fair
Germantown Pike over Five Mile Run	Montgomery	3 — Serious	23,102	Fair
New Falls Road over Mill Creek	Bucks	3 — Serious	22,307	Fair
RT 0008 NB SB over Pine Creek	Allegheny	3 — Serious	22,269	Fair
Pa 61 (lr 141) over Mahonney Creek	Schuylkill	3 — Serious	22,116	Fair
Us-1 Bypass (nb) over W Frk E Br White Clay CR	Chester	3 — Serious	21,979	Fair
US 1 By-pass (nb) over E.frk Br. White Clay CR	Chester	3 — Serious	21,979	Fair
Pa 611 (lr 168) over Scot Run	Monroe	3 — Serious	21,965	Fair
Pa 611 over Swiftwater Creek	Monroe	3 — Serious	21,965	Fair
US 209 (lr 461 W) over Marshalls Creek	Monroe	3 — Serious	21,886	Poor
Dr.geo.s.smith Brg over Lehigh River	Northampton	3 — Serious	21,778	Fair
Sr0015 over Buffalo Creek	Union	3 — Serious	21,561	Fair
Pa Tpk (i-76) over Trout Run	Franklin	3 — Serious	21,433	Fair
Pa Tpk (i-76) over Ten Mile Run	Fulton	3 — Serious	21,197	Fair
Pa 61 (lr 160) over Pigeon Creek	Berks	3 — Serious	21,192	Fair
Old York Road over Tacony Creek	Montgomery	3 — Serious	21,032	Fair
John Fries Highway over Molasses Creek	Bucks	3 — Serious	20,666	Fair
SR 3014-us 322 Bus over Slab Cabin Run	Centre	3 — Serious	20,393	Fair
Pa 72; SR 0072 over Little Conestoga Creek	Lancaster	3 — Serious	20,141	Fair
Egypt Road over Mine Run	Montgomery	3 — Serious	19,593	Fair
70th Street over Cobbs Creek	Philadelphia	3 — Serious	19,500	Fair
Sumneytown Pike over Towamencin Creek	Montgomery	3 — Serious	19,455	Poor
Golden Mile Hw over Abers Creek	Allegheny	3 — Serious	19,380	Fair
Swamp Road over Pine Run	Bucks	3 — Serious	19,355	Fair
Sumneytown Pike over Towamencin Creek	Montgomery	3 — Serious	19,293	Fair
Chester Pike over Muckinipattus Creek	Delaware	3 — Serious	19,177	Fair
Paper Mill Road over Branch Wissahickon Creek	Montgomery	3 — Serious	18,982	Fair
John Fries Highway over Unami Creek	Bucks	3 — Serious	18,805	Fair
Pennsylvania Ave. over White Clay Creek	Chester	3 — Serious	18,776	Poor
SR 26-pa 26 over Thompson Run	Centre	3 — Serious	18,741	Fair
SR 2004 River ST over Mill Creek	Luzerne	3 — Serious	18,527	Poor
Cobbs Creek Parkwa over Cobbs Creek	Philadelphia	3 — Serious	18,222	Poor
Cobbs Creek Parkwa over Cobbs Creek	Philadelphia	3 — Serious	18,222	Fair
Lancaster Avenue over East Br. Brandywine Ck.	Chester	3 — Serious	18,163	Poor
US 1 By-pass over West Branch Big Elk Cr.	Chester	3 — Serious	18,144	Fair
Chester Pike over Crum Creek	Delaware	3 — Serious	18,095	Poor
Holme Avenue over Pennypack Creek	Philadelphia	3 — Serious	17,735	Fair
US 422(lr 149) over Little Cacoosing Creek	Berks	3 — Serious	17,731	Fair
Doylestown By-pass over Branch Neshaminy Creek	Bucks	3 — Serious	17,386	Fair
SR 0011 Tr 11 over Susq River Rr SR 2037	Luzerne	3 — Serious	17,383	Poor
Easton Road over North Br.neshaminy Creek	Bucks	3 — Serious	17,187	Fair
Valley Forge Road over Trout/maschellamac Creek	Montgomery	3 — Serious	17,059	Poor
Old William Penn over Thompson Run	Allegheny	3 — Serious	16,904	Poor
Pine Grove Road over Rock Run	Bucks	3 — Serious	16,902	Fair
SR 422 Wb(lr 146) over Leafs Run	Berks	3 — Serious	16,823	Fair
SR 422(lr 149) over Cacoosing Creek	Berks	3 — Serious	16,737	Fair
US 422(lr 149) over Manor Creek	Berks	3 — Serious	16,678	Fair
SR 0315 Tr 315 over Mill Creek	Luzerne	3 — Serious	16,498	Fair
Lincoln Highway over W Br Brandywine Creek	Chester	3 — Serious	16,027	Poor
Ridge Avenue over Wissahickon Creek	Philadelphia	3 — Serious	15,917	Poor
Buck Road over Mill Creek	Bucks	3 — Serious	15,720	Poor
US 202 over Aquetong Creek	Bucks	3 — Serious	15,615	Fair
SR 0415 Tr 415 over Toby Creek	Luzerne	3 — Serious	15,449	Poor
SR 0415 Tr 415 over Toby Creek	Luzerne	3 — Serious	15,449	Fair
Fox Chapel RD over Sycamore Run	Allegheny	3 — Serious	15,217	Fair
SR 0309 Tr 309 over Little Black Creek	Luzerne	3 — Serious	15,032	Fair
Fitzwatertown Road over Branch Pennypack Creek	Montgomery	3 — Serious	14,968	Fair
Wildwood Road over Pine Creek	Allegheny	3 — Serious	14,925	Fair
Brandywine Avenue over Mill-race Creek	Chester	3 — Serious	14,824	Fair
York Road over Branch Pennypack Creek	Montgomery	3 — Serious	14,809	Fair
Bridge ST / 3152g7 over Branch Delaware River	Bucks	3 — Serious	14,803	Fair
Pa 183(lr 310) over Schuylkill Riv;nsrc;road	Berks	3 — Serious	14,759	Fair
SR 1010 (lr 06117) over Trib.willow Creek	Berks	3 — Serious	14,685	Fair
Bristol Road over Br.little Neshaminy Cr.	Bucks	3 — Serious	14,595	Fair
Essington Avenue over Crum Creek	Delaware	3 — Serious	14,523	Fair
County Line Road over Park Creek	Bucks	3 — Serious	14,495	Fair
Valley Forge Road over Zacharias Creek	Montgomery	3 — Serious	14,446	Fair
SR 150-pa 150 over Penna Canal	Clinton	3 — Serious	14,443	Fair
Tyburn Road over Branch Martins Creek	Bucks	3 — Serious	14,412	Fair
Cowpath Road over Branch Neshaminy Creek	Montgomery	3 — Serious	14,399	Fair
High Street over Sprogels Run	Montgomery	3 — Serious	14,340	Poor
Germantown Pike over Skippack Creek	Montgomery	3 — Serious	14,242	Fair
SR 0315 Tr 315 over Gardners Creek	Luzerne	3 — Serious	14,152	Fair
SR 61 over Over Bennys Run	Northumberland	3 — Serious	14,116	Fair
Sumneytown Pike over Indian Creek/ 3030f04	Montgomery	3 — Serious	14,013	Fair
Butler Avenue over North Br.neshaminy Creek	Bucks	3 — Serious	13,911	Poor
Baltimore Pike over Cobbs Creek	Delaware	3 — Serious	13,856	Fair
Pa-39;hershey Rd. over Swatara Creek	Dauphin	3 — Serious	13,843	Fair
Skippack Pike over Stony Creek	Montgomery	3 — Serious	13,812	Fair
SR 322-us 322 over Sinking Creek	Centre	3 — Serious	13,783	Fair
Victory Avenue over Cobbs Creek	Delaware	3 — Serious	13,750	Poor
Hulmeville Road over Mill Creek / 3374-b1	Bucks	3 — Serious	13,531	Fair
Washington Lane over Rock Park Creek	Montgomery	3 — Serious	13,466	Fair
Schuylkill Road over Stony Run Creek	Chester	3 — Serious	13,454	Fair
SR 20 Buffalo Road over Over Fourmile Creek	Erie	3 — Serious	13,435	Fair
Us-1 Bypass (sb) over W Frk E Br White Clay CR	Chester	3 — Serious	13,382	Fair
US 1 By-pass (sb) over E.frk. Br. White Clay CR	Chester	3 — Serious	13,382	Fair
Chester Pike over Darby Creek	Delaware	3 — Serious	13,380	Poor
Butler Pike over Wissahickon Creek	Montgomery	3 — Serious	13,301	Poor
SR 20 Buffalo Road over Over Six Mile Creek	Erie	3 — Serious	13,267	Fair
Willits Road over Wooden Bridge Run	Philadelphia	3 — Serious	13,244	Poor
Horsham RD over Park Creek	Montgomery	3 — Serious	13,241	Fair
SR 2019 (lr 48021) over Bushkill Creek	Northampton	3 — Serious	13,117	Fair
Providence Road over Darby Creek	Delaware	3 — Serious	13,028	Poor
Pa 412 (lr 530) over Trib. To Saucon Creek	Northampton	3 — Serious	13,025	Fair
Grant Avenue over Byberry Creek	Philadelphia	3 — Serious	13,022	Fair
Grant Avenue over Byberry Creek	Philadelphia	3 — Serious	13,022	Fair
Valley Forge Road over Towamencin Creek	Montgomery	3 — Serious	12,986	Poor
Rhawn Street over Pennypack Creek	Philadelphia	3 — Serious	12,877	Poor
Rhawn Street over Pennypack Creek	Philadelphia	3 — Serious	12,877	Fair
Dublin Pike over Buck Creek	Bucks	3 — Serious	12,743	Poor
Main Street over Cobbs Creek	Delaware	3 — Serious	12,715	Fair
Pa 194; SR 0194 over South Br Of Conewago	Adams	3 — Serious	12,695	Fair
Township Line Road over Lodal Creek	Montgomery	3 — Serious	12,530	Poor
Paoli Pike over Chester Creek	Chester	3 — Serious	12,485	Fair
SR 3017 (lr 564) over Catasauqua Creek	Northampton	3 — Serious	12,475	Fair
Schuylkill Road over Pigeon Creek	Chester	3 — Serious	12,416	Fair
Lowries Run Rd. over Lowries Run	Allegheny	3 — Serious	12,322	Fair
Pa 183 (lr 417) over Panther Creek	Schuylkill	3 — Serious	12,303	Fair
Bells Mill Road over Wissahickon Creek	Philadelphia	3 — Serious	12,200	Poor
Downingtown Pike over Valley Creek	Chester	3 — Serious	12,126	Poor
Pa 715 (lr 45024) over Pocono Creek	Monroe	3 — Serious	12,104	Poor
SR 2023 (lr 165) over Bushkill Creek	Northampton	3 — Serious	12,031	Fair
West Chester Bypas over Taylors Run	Chester	3 — Serious	11,986	Fair
Elm Street over Lackawanna River	Lackawanna	3 — Serious	11,900	Poor
SR 1017(lr 39038) over Coplay Creek	Lehigh	3 — Serious	11,880	Fair
Burtner Road over Little Bull Creek	Allegheny	3 — Serious	11,736	Fair
Bustard Road over Towamencin Creek	Montgomery	3 — Serious	11,616	Fair
Penllyn Pike over Wissahickon Creek	Montgomery	3 — Serious	11,591	Poor
Ridge Pike over Perkiomen Creek	Montgomery	3 — Serious	11,474	Fair
Pa 183 (lr 06016) over Little Northkill Creek	Berks	3 — Serious	11,432	Fair
Blair Mill Road over Brch Pennypack Cr/3259a2	Montgomery	3 — Serious	11,408	Fair
Blair Mill Road over Branch Pennypack Creek	Montgomery	3 — Serious	11,408	Fair
SR 20 W.main St. over Over Trout Run	Erie	3 — Serious	11,349	Fair
Butler Pike over Prophecy Creek	Montgomery	3 — Serious	11,333	Poor
Sr0422 Eb&wb over Trib To Buffalo Creek	Armstrong	3 — Serious	11,269	Fair
Street Road over Pocopson Creek	Chester	3 — Serious	11,166	Poor
Pa 183 (lr 310) over Long Run	Schuylkill	3 — Serious	11,163	Fair
Front Street over Beaver Creek	Bucks	3 — Serious	11,160	Poor
Dutton Mill Road over Chester Creek	Delaware	3 — Serious	11,154	Fair
Kimberton Road over Pickering Creek	Chester	3 — Serious	11,149	Fair
East State Street over East Br. Red Clay Creek	Chester	3 — Serious	11,141	Fair
Pa 100(lr 672) over Jordan Creek	Lehigh	3 — Serious	11,127	Fair
Wyomissing BLVD over Wyomissing Creek	Berks	3 — Serious	11,125	Fair
Pottstown Pike over French Creek	Chester	3 — Serious	11,100	Fair
SR 3013 over Blair Gap Run	Blair	3 — Serious	11,038	Fair
SR 2002(appl.1461) over Little Aquashicola Creek	Carbon	3 — Serious	10,968	Poor
Dublin Pike over Morgan Creek	Bucks	3 — Serious	10,965	Poor
Broad Street over Beaver Run	Bucks	3 — Serious	10,965	Fair
Conestoga Road over Pine Creek	Chester	3 — Serious	10,840	Fair
Sr0356 over Sarver Run	Butler	3 — Serious	10,782	Fair
Pa 54 over North Branch Susq River	Montour	3 — Serious	10,761	Good
Pa 512 (lr 48046) over Monocacy Creek	Northampton	3 — Serious	10,672	Fair
SR 2011 over Kreutz Creek	York	3 — Serious	10,619	Fair
Pa 724 (lr 147) over Allegheny Creek	Berks	3 — Serious	10,331	Poor
SR 79 NB over Over SR 3020 & Elk Ck.	Erie	3 — Serious	10,274	Fair
Tyburn Road over Rock Run	Bucks	3 — Serious	10,266	Poor
Conestoga Road over Ithan Creek	Delaware	3 — Serious	10,128	Poor
Easton Road over Cabin Run Creek	Bucks	3 — Serious	10,089	Fair
SR 54 over Over Mahoning Cr.	Montour	3 — Serious	10,026	Fair
SR 2001 over Sloat Brook	Pike	3 — Serious	10,020	Fair
Krewstown Road over Pennypack Creek	Philadelphia	3 — Serious	10,000	Poor
Gravel Pike over Lodal Creek	Montgomery	3 — Serious	9,993	Fair
Township Line Road over Stony Creek / 3255-j5	Montgomery	3 — Serious	9,921	Fair
Swamp Road over Branch Neshaminy Creek	Bucks	3 — Serious	9,883	Fair
Moreland Avenue over Branch Of Pennypack Crk	Montgomery	3 — Serious	9,860	Poor
Pa 343;s.pine Grv. over Elizabeth Run	Lebanon	3 — Serious	9,847	Poor
SR 2011(lr 157 Sp) over Tr.laurel Ck	Berks	3 — Serious	9,745	Fair
SR 0081 I-81 NB over Trowbridge Creek	Susquehanna	3 — Serious	9,678	Fair