Scour Critical Bridges in Pennsylvania

2,233 bridges in Pennsylvania at risk from water erosion around foundations.

Scour Critical Bridges

Scour is the erosion of soil and rock around a bridge's foundation caused by moving water. When foundations are exposed or undermined, a bridge can collapse even if its deck and superstructure are in good condition. Scour is the leading cause of bridge failures in the US. These 2,233 bridges in Pennsylvania have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
SANDY RUN / 3257-H10	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1958	58,495
MILL CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1959	54,739
OLD WM PENN HWY LEAK RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1962	52,457
PENNYPACK CRK;PATHS	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1920	52,330
NESHAMINY CR & SR 2027	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1964	46,995
NESHAMINY CR & APPL 276	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1964	44,629
MONOCACY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1941	44,528
SAW MILL RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1926	42,292
TOBY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1963	41,421
PLUM CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1952	38,689
CROSSKILL CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1929	37,481
BRANCH NESHAMINY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1937	35,170
MORGAN CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1936	35,087
JACOBS CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1939	34,232
PENNYPACK CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1968	32,800
MILL CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1956	32,446
W.BRANCH RED CLAY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1965	32,115
BRANCH BROWNS RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1960	31,662
PINE CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1925	31,339
WOODEN BRIDGE RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1964	30,410
PLYMOUTH CREEK / 3368-E4	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1962	30,162
W. BR. NESHAMINY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1934	30,106
PENNYPACK CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1959	30,060
TOBY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1941	29,878
TOBY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1941	29,878
TRIB.TO MOSELEM CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1934	29,775
DARBY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1950	29,754
GLADES CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1939	29,452
COBBS CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1934	27,899
SAUCON CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1929	27,279
STONY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1878	27,202
MANATAWNY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1958	26,919
CROWS RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1900	26,289
LEWIS RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1958	25,938
LITTLE CHIQUES CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1968	24,666
Conewago Creek	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1949	24,423
SOUTHAMPTON CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1966	24,196
BRANCH STONY CR/ 3255H08	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1949	23,491
FIVE MILE RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1887	23,102
MILL CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1970	22,307
PINE CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1912	22,269
MAHONNEY CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1937	22,116
W FRK E BR WHITE CLAY CR	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1965	21,979
E.FRK BR. WHITE CLAY CR	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1965	21,979
SCOT RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1948	21,965
SWIFTWATER CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1957	21,965
MARSHALLS CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Poor	1930	21,886
LEHIGH RIVER	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1912	21,778
BUFFALO CREEK	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1930	21,561
TROUT RUN	Pennsylvania	Scour Critical — Countermeasures Installed	Fair	1939	21,433

Scour Critical Rating Codes

Code 2 — Unaddressed	Bridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures Installed	Protective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures Ineffective	Protective measures were installed but have been assessed as ineffective. The bridge requires re-evaluation and additional action.

About Scour Critical Bridges

Scour critical bridges have been identified through underwater inspection or analysis as having foundations that are unstable or could become unstable during flood conditions. FHWA requires action plans for all scour critical bridges. Famous scour failures include the 1987 Schoharie Creek Bridge collapse in New York.

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