Scour Critical Bridges in Indiana
756 bridges in Indiana 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 756 bridges in Indiana have been identified as vulnerable to scour damage.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| GUTHRIE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1979 | 3,929 |
| BIRD HOLLOW CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1956 | 3,910 |
| MAUMEE RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1962 | 3,904 |
| M FORK WILDCAT CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1933 | 3,852 |
| GRASSY FORK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1985 | 3,852 |
| E FK WHITE RIVER OVFL | Indiana | Scour Critical — Countermeasures Installed | Fair | 1981 | 3,814 |
| LIMESTONE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1936 | 3,806 |
| MUD CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1947 | 3,800 |
| BIG BLUE RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1926 | 3,784 |
| BUTLER CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1992 | 3,783 |
| FALL CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1998 | 3,783 |
| FRENCH DITCH | Indiana | Scour Critical — Countermeasures Installed | Fair | 1934 | 3,777 |
| MONTGOMERY DITCH | Indiana | Scour Critical — Countermeasures Installed | Fair | 1953 | 3,733 |
| MAPLE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1989 | 3,723 |
| DEEDS CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1947 | 3,722 |
| BRANCH POLSON CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1983 | 3,694 |
| M FORK WILDCAT CREEK | Indiana | Scour Critical — Countermeasures Installed | Good | 1993 | 3,675 |
| LITTLE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1985 | 3,639 |
| TURKEY CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1957 | 3,632 |
| BIRCH CREEK OVERFLOW | Indiana | Scour Critical — Countermeasures Installed | Fair | 1986 | 3,508 |
| INDIAN CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1984 | 3,490 |
| LTL INDIAN CR CSX RR | Indiana | Scour Critical — Countermeasures Installed | Fair | 1993 | 3,434 |
| LITTLE WABASH RIVER | Indiana | Scour Critical — Countermeasures Installed | Good | 1986 | 3,404 |
| MISSISSINEWA RIVER | Indiana | Scour Critical — Countermeasures Installed | Poor | 1966 | 3,370 |
| DRY BRANCH | Indiana | Scour Critical — Countermeasures Installed | Good | 1957 | 3,360 |
| HOG CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1933 | 3,350 |
| LITTLE WABASH RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1928 | 3,350 |
| SUGAR CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1970 | 3,340 |
| TIMMONS DITCH | Indiana | Scour Critical — Countermeasures Installed | Fair | 1936 | 3,288 |
| LITTLE PIPE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1933 | 3,287 |
| INDIAN CREEK | Indiana | Scour Critical — Countermeasures Installed | Good | 1992 | 3,278 |
| SUGAR CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1965 | 3,260 |
| LITTLE BLUE RIVER | Indiana | Scour Critical — Countermeasures Installed | Good | 1988 | 3,248 |
| FLAT CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1926 | 3,248 |
| DRY BRANCH | Indiana | Scour Critical — Countermeasures Installed | Good | 1976 | 3,220 |
| MILL CREEK | Indiana | Scour Critical — Countermeasures Installed | Good | 1989 | 3,193 |
| US 36 LTL RACCOON CR R | Indiana | Scour Critical — Countermeasures Installed | Fair | 1974 | 3,177 |
| DIXON DITCH | Indiana | Scour Critical — Countermeasures Installed | Fair | 1929 | 3,144 |
| US 36 LTL RACCOON CR R | Indiana | Scour Critical — Countermeasures Installed | Fair | 1974 | 3,139 |
| FLATROCK RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1992 | 3,120 |
| MUD CREEK | Indiana | Scour Critical — Countermeasures Installed | Good | 1971 | 3,093 |
| MUD CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1976 | 3,093 |
| IRISH RUN CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1984 | 3,009 |
| YELLOW RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1994 | 3,008 |
| PIPE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1965 | 2,987 |
| WHITE RIVER | Indiana | Scour Critical — Countermeasures Installed | Fair | 1990 | 2,965 |
| LYNN CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1955 | 2,910 |
| BEAVER MEADOW CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1955 | 2,910 |
| LONGS BRANCH | Indiana | Scour Critical — Countermeasures Installed | Good | 1955 | 2,870 |
| SIX MILE CREEK | Indiana | Scour Critical — Countermeasures Installed | Fair | 1934 | 2,803 |
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.