Scour Critical Bridges in Vermont
242 bridges in Vermont 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 242 bridges in Vermont have been identified as vulnerable to scour damage.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| NO. BR. HOOSIC RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1963 | 1,000 |
| NO. BR. HOOSIC RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1963 | 1,000 |
| STANHOPE BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1930 | 1,000 |
| CONNECTICUT RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1947 | 981 |
| BOURN BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1929 | 960 |
| LAMOILLE RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1997 | 915 |
| LAKE LAMOILLE | Vermont | Scour Critical — Countermeasures Installed | Fair | 1977 | 860 |
| COLD BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1967 | 850 |
| MILL BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1939 | 850 |
| SAXTONS RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1937 | 810 |
| EAST BR.PASSUMPSIC RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1951 | 800 |
| WALLOOMSAC RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1975 | 780 |
| COBB BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1976 | 780 |
| LAMOILLE RIVER | Vermont | Scour Critical — Countermeasures Installed | Poor | 1924 | 750 |
| LAMOILLE RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1965 | 750 |
| MORRILL BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1935 | 740 |
| ANDOVER BRANCH | Vermont | Scour Critical — Countermeasures Installed | Fair | 1979 | 730 |
| OTTER CREEK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1840 | 700 |
| HAWKINS BROOK | Vermont | Scour Critical — Countermeasures Installed | Poor | 1928 | 650 |
| MID. BR WILLIAMS RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1961 | 610 |
| BEDELL BROOK | Vermont | Scour Critical — Countermeasures Installed | Good | 1967 | 600 |
| COLD BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1930 | 600 |
| JEWELL BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1937 | 600 |
| W. BR. OMPOMPANOOSUC R. | Vermont | Scour Critical — Countermeasures Installed | Fair | 1919 | 600 |
| BURGESS BROOK | Vermont | Scour Critical — Countermeasures Installed | Good | 1923 | 590 |
| WARDSBORO BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1926 | 540 |
| SLEEPERS RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1929 | 500 |
| SHEPARD BROOK | Vermont | Scour Critical — Countermeasures Installed | Poor | 1928 | 500 |
| MOOSE RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1930 | 500 |
| WHITE RIVER | Vermont | Scour Critical — Countermeasures Installed | Poor | 1928 | 500 |
| CONNECTICUT RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1930 | 481 |
| BLOODY BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1931 | 400 |
| COOKVILLE BROOK | Vermont | Scour Critical — Countermeasures Installed | Good | 1955 | 400 |
| CASTLETON RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1919 | 400 |
| MOOSE RIVER | Vermont | Scour Critical — Countermeasures Installed | Poor | 1930 | 400 |
| MILL POND BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1934 | 400 |
| BARNARD BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1958 | 400 |
| MILL BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1919 | 390 |
| WEST BR. PASSUMPSIC RIV. | Vermont | Scour Critical — Countermeasures Installed | Fair | 1922 | 350 |
| STANNARD BROOK | Vermont | Scour Critical — Countermeasures Installed | Poor | 1929 | 350 |
| GREEN RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1966 | 350 |
| GRASSY BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1932 | 350 |
| THE BRANCH | Vermont | Scour Critical — Countermeasures Installed | Good | 1937 | 350 |
| COPPERMINE BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1958 | 350 |
| RYDER BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1934 | 340 |
| BARTON RIVER | Vermont | Scour Critical — Countermeasures Installed | Good | 1974 | 310 |
| CHARLES BROWN BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1958 | 300 |
| WELLS RIVER | Vermont | Scour Critical — Countermeasures Installed | Fair | 1940 | 300 |
| ROUNDY BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1929 | 250 |
| WADE BROOK | Vermont | Scour Critical — Countermeasures Installed | Fair | 1927 | 250 |
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.