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
BR. MANATAWNY CREEK Pennsylvania Scour Critical — Unaddressed Poor 1964 6,195
MOUNTAIN RUN CREEK Pennsylvania Scour Critical — Unaddressed Poor 1916 4,717
TRIB TO DEEP CREEK Pennsylvania Scour Critical — Unaddressed Poor 1991 2,214
LEGGETTS CREEK Pennsylvania Scour Critical — Unaddressed Poor 1979 2,000
SCIOTO CREEK Pennsylvania Scour Critical — Unaddressed Poor 1932 1,793
APPENZELL CREEK Pennsylvania Scour Critical — Unaddressed Poor 1941 1,773
SOUTH DRY RUN Pennsylvania Scour Critical — Unaddressed Poor 1913 1,634
ANTIETAM CREEK Pennsylvania Scour Critical — Unaddressed Poor 1968 1,017
CLOVER CREEK Pennsylvania Scour Critical — Unaddressed Poor 1908 667
LAUREL RUN Pennsylvania Scour Critical — Unaddressed Poor 1832 500
BIG RUN Pennsylvania Scour Critical — Unaddressed Poor 1974 500
FURNACE CREEK Pennsylvania Scour Critical — Unaddressed Poor 1920 456
WILLOW CREEK Pennsylvania Scour Critical — Unaddressed Poor 1934 424
ANTIETAM CREEK Pennsylvania Scour Critical — Unaddressed Poor 1939 350
THOMPSON RUN CREEK Pennsylvania Scour Critical — Unaddressed Poor 1900 300
KNIGHTS RUN Pennsylvania Scour Critical — Unaddressed Poor 1900 250
OVER LITTLE SUGAR CREEK Pennsylvania Scour Critical — Unaddressed Poor 1910 200
LAUREL RUN CREEK Pennsylvania Scour Critical — Unaddressed Poor 1935 200
PINE CREEK Pennsylvania Scour Critical — Unaddressed Poor 1952 154
NESHANNOCK WEST BRANCH Pennsylvania Scour Critical — Unaddressed Poor 1940 150
TRIB. TO MILL CREEK Pennsylvania Scour Critical — Unaddressed Poor 1939 150
Wissahickon Creek Pennsylvania Scour Critical — Unaddressed Poor 1915 100
DEEP CREEK Pennsylvania Scour Critical — Unaddressed Poor 1920 100
SCOT RUN Pennsylvania Scour Critical — Unaddressed Poor 1940 100
COLD RUN CREEK Pennsylvania Scour Critical — Unaddressed Poor 1950 100
DIRTY CAMP RUN Pennsylvania Scour Critical — Unaddressed Poor 1910 100
CAMP RUN Pennsylvania Scour Critical — Unaddressed Poor 1921 100
POCONO CREEK Pennsylvania Scour Critical — Unaddressed Poor 1935 100
MCCABE RUN Pennsylvania Scour Critical — Unaddressed Poor 1977 75
N BR COWANESQUE RIVER Pennsylvania Scour Critical — Unaddressed Poor 1951 50
TUB RUN CREEK Pennsylvania Scour Critical — Unaddressed Fair 1989 50
OVER FOUR MILE RUN Pennsylvania Scour Critical — Unaddressed Poor 1970 50
KEFFER RUN Pennsylvania Scour Critical — Unaddressed Poor 1981 50
W. BR. WALLENPAUPACK CR. Pennsylvania Scour Critical — Unaddressed Poor 1930 50
LITTLE SWATARA CREEK Pennsylvania Scour Critical — Unaddressed Poor 2007 50
Spruce Run Pennsylvania Scour Critical — Unaddressed Poor 1901 50
Welty Run Pennsylvania Scour Critical — Unaddressed Poor 1972 50
DRINKER CREEK Pennsylvania Scour Critical — Unaddressed Poor 1920 25
Little Shenango Branch Pennsylvania Scour Critical — Unaddressed Poor 1965 24
BROWNS CREEK Pennsylvania Scour Critical — Unaddressed Poor 1919 20
Wright Creek Pennsylvania Scour Critical — Unaddressed Poor 1963 15
MUD CREEK Pennsylvania Scour Critical — Unaddressed Poor 1907 1
SALT RUN Pennsylvania Scour Critical — Unaddressed Poor 1929
POTTS RUN Pennsylvania Scour Critical — Unaddressed Poor 1905
CHIQUES CREEK Pennsylvania Scour Critical — Unaddressed Poor 1925
MEADE RUN Pennsylvania Scour Critical — Countermeasures Ineffective Fair 1976 50
SANDY RUN Pennsylvania Scour Critical — Countermeasures Installed Good 1954 74,921
LAUREL RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1963 66,529
TOWAMENCIN CREEK Pennsylvania Scour Critical — Countermeasures Installed Good 1955 65,329
SCHUY.RIVER SERVICE RD. Pennsylvania Scour Critical — Countermeasures Installed Fair 1963 59,527

Scour Critical Rating Codes

Code 2 — UnaddressedBridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures InstalledProtective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures IneffectiveProtective 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.