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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
BIG CREEK Colorado Scour Critical — Countermeasures Installed Fair 1918 1,600
FRENCHMAN CREEK Colorado Scour Critical — Countermeasures Installed Poor 1934 1,500
BURRO RIVER Colorado Scour Critical — Countermeasures Installed Fair 1936 1,500
UPPER BEAR CREEK | UPPER Colorado Scour Critical — Countermeasures Installed Fair 1992 1,436
UPPER BEAR CREEK Colorado Scour Critical — Countermeasures Installed Fair 1992 1,308
NORTH CHEYENNE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1950 1,202
EUREKA CREEK Colorado Scour Critical — Countermeasures Installed Fair 1968 1,200
LEWIS CREEK Colorado Scour Critical — Countermeasures Installed Fair 1989 1,100
DRAW Colorado Scour Critical — Countermeasures Installed Fair 1937 1,100
UPPER BEAR CREEK Colorado Scour Critical — Countermeasures Installed Fair 1992 1,066
SAND CREEK Colorado Scour Critical — Countermeasures Installed Fair 1952 1,000
SHOOKS RUN Colorado Scour Critical — Countermeasures Installed Poor 1938 932
EAST MUDDY CREEK Colorado Scour Critical — Countermeasures Installed Fair 1978 930
S BRANCH HYLAND CREEK Colorado Scour Critical — Countermeasures Installed Good 1998 919
CLEAR CREEK SR Colorado Scour Critical — Countermeasures Installed Poor 1936 917
GORE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1975 869
COCKELBURR CREEK Colorado Scour Critical — Countermeasures Installed Fair 1930 800
ALAMOSA RIVER Colorado Scour Critical — Countermeasures Installed Fair 1954 790
EAGLE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1950 748
S Boulder Diversion Cana Colorado Scour Critical — Countermeasures Installed Fair 1952 740
BLACK WOLF CREEK Colorado Scour Critical — Countermeasures Installed Fair 1974 720
Vasquez Creek Colorado Scour Critical — Countermeasures Installed Good 1996 703
ROCK CREEK Colorado Scour Critical — Countermeasures Installed Fair 1962 650
CEMENT CREEK Colorado Scour Critical — Countermeasures Installed Poor 1929 647
WEST PLUM CREEK Colorado Scour Critical — Countermeasures Installed Fair 1951 644
DRAW Colorado Scour Critical — Countermeasures Installed Fair 1964 640
COLORADO RIVER AR Colorado Scour Critical — Countermeasures Installed Fair 1971 611
CEBOLLA CREEK Colorado Scour Critical — Countermeasures Installed Fair 1958 560
DRY CREEK Colorado Scour Critical — Countermeasures Installed Fair 1972 560
LAKE FK GUNNISON RIVER Colorado Scour Critical — Countermeasures Installed Fair 1957 560
GUNNISON RIVER Colorado Scour Critical — Countermeasures Installed Fair 1958 540
DOLORES RIVER Colorado Scour Critical — Countermeasures Installed Fair 1957 540
DRAW Colorado Scour Critical — Countermeasures Installed Poor 1936 520
S FK PURGATOIRE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1936 520
BLUE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1980 483
South Arkansas River Colorado Scour Critical — Countermeasures Installed Good 2014 475
FARMERS HIGHLINE CANAL Colorado Scour Critical — Countermeasures Installed Fair 1980 452
Cedar Creek Colorado Scour Critical — Countermeasures Installed Good 1987 434
DRAW Colorado Scour Critical — Countermeasures Installed Poor 1939 420
UNCOMPAHGRE RIVER Colorado Scour Critical — Countermeasures Installed Fair 1982 402
CUCHARAS RIVER Colorado Scour Critical — Countermeasures Installed Fair 1984 390
E SPRING CREEK TRIB. Colorado Scour Critical — Countermeasures Installed Fair 1969 380
Baldwin Creek Colorado Scour Critical — Countermeasures Installed Fair 2019 371
HORSE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1936 340
SAGUACHE CREEK Colorado Scour Critical — Countermeasures Installed Fair 1984 335
Little Thompson River Colorado Scour Critical — Countermeasures Installed Good 2019 331
CROOKED ARROYO Colorado Scour Critical — Countermeasures Installed Fair 1935 320
E. BIJOU CREEK Colorado Scour Critical — Countermeasures Installed Fair 1965 315
BEAR CREEK Colorado Scour Critical — Countermeasures Installed Poor 1938 291
TONGUE CREEK Colorado Scour Critical — Countermeasures Installed Poor 1984 267

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