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
TROUT CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1925 1,896
RIDLEY CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1922 1,886
MIDDLE CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1937 1,873
CATS CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1928 1,872
OVER TEMPLE RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1958 1,840
ALDER RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1930 1,834
VALLEY CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1867 1,831
TROUT RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1970 1,800
OUTLET REINING POND Pennsylvania Scour Critical — Countermeasures Installed Fair 1935 1,778
EAST BRANCH RED CLAY CR. Pennsylvania Scour Critical — Countermeasures Installed Poor 1926 1,777
FISHING CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1950 1,763
S BR CODORUS CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1910 1,760
MILL CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1928 1,733
BONNIE BROOK Pennsylvania Scour Critical — Countermeasures Installed Poor 1951 1,727
PERKIOMEN CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1909 1,723
MONROE CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1931 1,695
BEAVER CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1966 1,690
FISHING CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1956 1,687
OVER BUTCHERY RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1930 1,686
CONEWAGO CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1932 1,685
TRIB TO IRONSTONE CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1934 1,675
TRIB.TO CROSSKILL CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1958 1,673
LAUREL RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1963 1,665
UNAMI CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1929 1,665
FRENCH CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1837 1,662
OVER SOUTH CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1953 1,658
SPRUCE CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1952 1,651
TRIB. TO MUDDY CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1955 1,648
RAVERS RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1929 1,645
EAST BR.WHITE CLAY CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1912 1,642
SWITZER CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1930 1,641
BRANCH BALD EAGLE CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1952 1,640
BRANCH BALD EAGLE CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1952 1,640
MARTIN CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1961 1,639
NORTH BR CALKINS CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1951 1,638
Pine Run Pennsylvania Scour Critical — Countermeasures Installed Poor 1951 1,637
CULBERTSON RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1932 1,635
ROCK RUN Pennsylvania Scour Critical — Countermeasures Installed Poor 1966 1,632
LACKAWANNA RIVER Pennsylvania Scour Critical — Countermeasures Installed Poor 1969 1,632
PERKIOMEN CREEK 2804H07 Pennsylvania Scour Critical — Countermeasures Installed Fair 1933 1,628
SWAMP CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1954 1,619
TRIB. TO BRUSH CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1982 1,600
OVER SANDY CREEK TRIB Pennsylvania Scour Critical — Countermeasures Installed Fair 1937 1,592
OVER PRATHER RUN Pennsylvania Scour Critical — Countermeasures Installed Poor 1926 1,581
APPENZELL CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1930 1,576
ALLEGHENY CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1937 1,574
SALT RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1942 1,571
HOFFER CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1928 1,568
GADDES RUN Pennsylvania Scour Critical — Countermeasures Installed Fair 1885 1,567
WYOMISSING CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1949 1,556

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.