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Scour Critical Bridges in Colorado

241 bridges in Colorado 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 241 bridges in Colorado have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
BEAR CREEK Colorado Scour Critical — Countermeasures Installed Fair 1963 5,000
TURKEY CREEK Colorado Scour Critical — Countermeasures Installed Fair 1977 4,900
ARKANSAS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1967 4,700
YAMPA RIVER Colorado Scour Critical — Countermeasures Installed Good 1976 4,600
ARKANSAS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1951 4,500
KING ARROYO Colorado Scour Critical — Countermeasures Installed Fair 1961 4,500
FARMERS HIGHLINE CANAL Colorado Scour Critical — Countermeasures Installed Fair 1959 4,326
YAMPA RIVER Colorado Scour Critical — Countermeasures Installed Fair 1967 4,200
Big Thompson River Colorado Scour Critical — Countermeasures Installed Fair 1971 4,139
ARKANSAS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1955 4,100
LOCAL DRAINAGE Colorado Scour Critical — Countermeasures Installed Good 2018 4,074
FOUNTAIN CREEK Colorado Scour Critical — Countermeasures Installed Fair 1964 4,005
BLUE RIBBON ARROYO Colorado Scour Critical — Countermeasures Installed Fair 1950 4,000
INDIAN CREEK Colorado Scour Critical — Countermeasures Installed Fair 1959 4,000
MANCOS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1959 4,000
ANDERSON ARROYO Colorado Scour Critical — Countermeasures Installed Poor 1931 3,981
DRAW CATTLE UNDERPASS Colorado Scour Critical — Countermeasures Installed Fair 1961 3,900
SHOOKS RUN Colorado Scour Critical — Countermeasures Installed Fair 1955 3,894
BIG SANDY CREEK Colorado Scour Critical — Countermeasures Installed Fair 1971 3,800
CONEJOS RIV.OVERFLOW Colorado Scour Critical — Countermeasures Installed Poor 1929 3,200
CONEJOS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1929 3,200
FARMERS HIGHLINE CANAL Colorado Scour Critical — Countermeasures Installed Fair 1930 3,182
DRAW Colorado Scour Critical — Countermeasures Installed Fair 1935 3,000
DUTCH CREEK Colorado Scour Critical — Countermeasures Installed Fair 1997 2,996
HAY CREEK Colorado Scour Critical — Countermeasures Installed Fair 1930 2,901
SURVEYOR CREEK Colorado Scour Critical — Countermeasures Installed Fair 1935 2,900
EAST FORK ARKANSAS RIVER Colorado Scour Critical — Countermeasures Installed Good 2008 2,700
UNCOMPAHGRE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1966 2,600
DRAW Colorado Scour Critical — Countermeasures Installed Poor 1938 2,600
Crystal River Colorado Scour Critical — Countermeasures Installed Fair 1950 2,569
BAKERS GULCH Colorado Scour Critical — Countermeasures Installed Fair 1936 2,500
South Platte River Colorado Scour Critical — Countermeasures Installed Fair 1973 2,391
TODD CREEK Colorado Scour Critical — Countermeasures Installed Fair 1960 2,323
DRAW Colorado Scour Critical — Countermeasures Installed Poor 1943 2,300
MIDDLE FK S.PLATTE RVR Colorado Scour Critical — Countermeasures Installed Fair 1951 2,300
NORTH FORK GUNNISON RVR Colorado Scour Critical — Countermeasures Installed Fair 1955 2,165
Dry Creek Colorado Scour Critical — Countermeasures Installed Fair 1982 2,122
CACHE LA POUDRE RIVER Colorado Scour Critical — Countermeasures Installed Good 1984 2,100
FRENCHMAN CREEK Colorado Scour Critical — Countermeasures Installed Fair 1949 1,900
GRAPE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1956 1,800
TEXAS CREEK Colorado Scour Critical — Countermeasures Installed Fair 1906 1,800
TAYLOR CREEK Colorado Scour Critical — Countermeasures Installed Good 1956 1,800
OBRIAN CANAL Colorado Scour Critical — Countermeasures Installed Fair 1984 1,788
N. Fork Republican River Colorado Scour Critical — Countermeasures Installed Fair 1996 1,702
ARKANSAS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1965 1,700
CHEYENNE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1955 1,659
SOUTH PLATTE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1956 1,600
SOUTH PLATTE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1956 1,600
SOUTH PLATTE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1956 1,600
BIG CREEK Colorado Scour Critical — Countermeasures Installed Fair 1918 1,600

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.

All Bridges Poor Condition Historic Bridges Bridge Stats