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Scour Critical Bridges in Minnesota

257 bridges in Minnesota 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 257 bridges in Minnesota have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1977 1,160
SNAKE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1986 1,100
LAC QUI PARLE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1971 1,100
GARDEN LAKE Minnesota Scour Critical — Countermeasures Installed Good 1952 1,000
S FK CROW RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1969 1,000
BIG COTTONWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1964 960
S FK WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Good 1984 950
BLUE EARTH RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1984 782
GETCHELL CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1940 780
SWAN RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1978 780
S BR MID FK ZUMBRO R Minnesota Scour Critical — Countermeasures Installed Good 1985 780
SKUNK RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1974 766
CLEARWATER RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1974 736
W BR RUM RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1966 690
STURGEON RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1948 680
CROW WING RIVER Minnesota Scour Critical — Countermeasures Installed Good 1980 667
POPLAR RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1966 660
SEELYE BROOK Minnesota Scour Critical — Countermeasures Installed Poor 1986 641
W BR RUM RIVER Minnesota Scour Critical — Countermeasures Installed Poor 1971 640
PINE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1971 620
SLEEPY EYE CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1968 574
N FK WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1923 570
MID FK ZUMBRO R Minnesota Scour Critical — Countermeasures Installed Good 1985 525
BIG COBB RIVER Minnesota Scour Critical — Countermeasures Installed Good 1978 510
SPUNK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1940 510
TWO RIVERS Minnesota Scour Critical — Countermeasures Installed Poor 1965 505
ELK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1965 500
BR ELK CRK Minnesota Scour Critical — Countermeasures Installed Fair 1965 500
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1965 500
LITTLE COTTONWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1979 492
RED RIVER OF THE NORTH Minnesota Scour Critical — Countermeasures Installed Fair 1974 490
REDWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1964 470
MAPLE RIVER Minnesota Scour Critical — Countermeasures Installed Poor 1956 465
BIG COBB RIVER Minnesota Scour Critical — Countermeasures Installed Good 1958 443
SNAKE RIVER Minnesota Scour Critical — Countermeasures Installed Poor 1958 418
DES MOINES RIVER Minnesota Scour Critical — Countermeasures Installed Good 1963 415
ELM CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1964 401
WELLS CREEK Minnesota Scour Critical — Countermeasures Installed Good 1967 400
DRY RUN Minnesota Scour Critical — Countermeasures Installed Fair 1940 396
MOOSE HORN RIVER Minnesota Scour Critical — Countermeasures Installed Poor 1971 394
N FK CROW RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1965 370
TIBBETTS BROOK Minnesota Scour Critical — Countermeasures Installed Fair 1974 365
WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1972 356
REDWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1957 355
SKUNK RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1989 353
E FK BEAVER CREEK Minnesota Scour Critical — Countermeasures Installed Good 1993 350
LAC QUI PARLE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1955 330
MAPLE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1963 328
CHAMPEPADAN CREEK Minnesota Scour Critical — Countermeasures Installed Good 1977 325
PIPESTONE CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1993 308

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