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.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| TAYLORS RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1956 | 11,986 |
| LACKAWANNA RIVER | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1958 | 11,900 |
| COPLAY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1910 | 11,880 |
| LITTLE BULL CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1970 | 11,736 |
| TOWAMENCIN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1855 | 11,616 |
| WISSAHICKON CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1964 | 11,591 |
| PERKIOMEN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1798 | 11,474 |
| LITTLE NORTHKILL CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1932 | 11,432 |
| BRANCH PENNYPACK CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1973 | 11,408 |
| BRCH PENNYPACK CR/3259A2 | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1958 | 11,408 |
| OVER TROUT RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1953 | 11,349 |
| PROPHECY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1926 | 11,333 |
| TRIB TO BUFFALO CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1960 | 11,269 |
| POCOPSON CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1937 | 11,166 |
| LONG RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1960 | 11,163 |
| BEAVER CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1928 | 11,160 |
| CHESTER CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1966 | 11,154 |
| PICKERING CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1961 | 11,149 |
| EAST BR. RED CLAY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1962 | 11,141 |
| JORDAN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1932 | 11,127 |
| WYOMISSING CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1931 | 11,125 |
| FRENCH CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1953 | 11,100 |
| BLAIR GAP RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1955 | 11,038 |
| LITTLE AQUASHICOLA CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1922 | 10,968 |
| BEAVER RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1920 | 10,965 |
| MORGAN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1930 | 10,965 |
| PINE CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1960 | 10,840 |
| SARVER RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1938 | 10,782 |
| NORTH BRANCH SUSQ RIVER | Pennsylvania | Scour Critical — Countermeasures Installed | Good | 2000 | 10,761 |
| MONOCACY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1923 | 10,672 |
| KREUTZ CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1970 | 10,619 |
| ALLEGHENY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1956 | 10,331 |
| OVER SR 3020 & ELK CK. | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1969 | 10,274 |
| ROCK RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1954 | 10,266 |
| ITHAN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1930 | 10,128 |
| CABIN RUN CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1950 | 10,089 |
| OVER MAHONING CR. | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1930 | 10,026 |
| SLOAT BROOK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1930 | 10,020 |
| Pennypack Creek | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1907 | 10,000 |
| LODAL CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1947 | 9,993 |
| STONY CREEK / 3255-J5 | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1933 | 9,921 |
| BRANCH NESHAMINY CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1936 | 9,883 |
| BRANCH OF PENNYPACK CRK | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1958 | 9,860 |
| ELIZABETH RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1968 | 9,847 |
| TR.LAUREL CK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1929 | 9,745 |
| TROWBRIDGE CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1961 | 9,678 |
| FURNACE RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Poor | 1930 | 9,664 |
| BEAVER RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1940 | 9,622 |
| OVER BULL RUN | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1937 | 9,622 |
| MILL CREEK | Pennsylvania | Scour Critical — Countermeasures Installed | Fair | 1965 | 9,578 |
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.