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Scour Critical Bridges in Nevada

94 bridges in Nevada 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 94 bridges in Nevada have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
N. FORK HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Good 1962 4,525
N. FORK HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Good 1962 4,525
BROCKLISS SLOUGH Nevada Scour Critical — Countermeasures Installed Good 1952 4,500
HUMBOLDT RVR Nevada Scour Critical — Countermeasures Installed Fair 1964 4,125
HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Fair 1964 4,125
TRUCKEE RIVER Nevada Scour Critical — Countermeasures Installed Fair 1975 3,900
TRUCKEE RIVER Nevada Scour Critical — Countermeasures Installed Fair 1974 3,900
NNRR & E. SQUAW CREEK Nevada Scour Critical — Countermeasures Installed Fair 1974 3,450
NNRR & E. SQUAW CREEK Nevada Scour Critical — Countermeasures Installed Fair 1974 3,450
SALMON FALLS CRK Nevada Scour Critical — Countermeasures Installed Fair 1933 3,200
CARSON RVR Nevada Scour Critical — Countermeasures Installed Fair 1987 2,900
TRUCKEE RIVER Nevada Scour Critical — Countermeasures Installed Fair 1978 2,600
MUDDY RVR Nevada Scour Critical — Countermeasures Installed Fair 1988 2,200
MUDDY RVR Nevada Scour Critical — Countermeasures Installed Fair 1988 2,200
LAS VEGAS WASH Nevada Scour Critical — Countermeasures Installed Fair 1977 2,000
TRUCKEE RIVER Nevada Scour Critical — Countermeasures Installed Fair 1928 1,815
CARSON RVR Nevada Scour Critical — Countermeasures Installed Fair 1947 1,750
MEADOW VALLEY WASH Nevada Scour Critical — Countermeasures Installed Fair 1958 1,600
MEADOW VALLEY WASH Nevada Scour Critical — Countermeasures Installed Fair 1934 1,600
CARSON RIVER Nevada Scour Critical — Countermeasures Installed Fair 1967 1,500
W WALKER RVR WILSON C Nevada Scour Critical — Countermeasures Installed Fair 1959 1,500
TRUCKEE RVR Nevada Scour Critical — Countermeasures Installed Fair 1972 1,300
LOUSETOWN CRK Nevada Scour Critical — Countermeasures Installed Fair 1998 1,000
TRUCKEE RVR Nevada Scour Critical — Countermeasures Installed Fair 1957 820
MEADOW VALLEY WASH Nevada Scour Critical — Countermeasures Installed Good 1932 740
DRY WASH Nevada Scour Critical — Countermeasures Installed Fair 1983 500
HUMBOLDT RVR Nevada Scour Critical — Countermeasures Installed Fair 1954 480
E FORK OWYHEE RVR Nevada Scour Critical — Countermeasures Installed Fair 1949 400
HUMBOLDT RVR Nevada Scour Critical — Countermeasures Installed Good 1986 350
HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Poor 1965 260
HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Fair 1965 260
GALENA CRK Nevada Scour Critical — Countermeasures Installed Fair 1981 243
LOUSETOWN CRK Nevada Scour Critical — Countermeasures Installed Poor 1995 139
WALKER RVR Nevada Scour Critical — Countermeasures Installed Good 1984 121
ELDORADO CANYON Nevada Scour Critical — Countermeasures Installed Fair 1941 103
HUMBOLDT RVR Nevada Scour Critical — Countermeasures Installed Fair 1940 100
MARYS RVR Nevada Scour Critical — Countermeasures Installed Fair 1940 100
HUMBOLDT RVR Nevada Scour Critical — Countermeasures Installed Good 1976 88
EAST FORK WALKER RVR Nevada Scour Critical — Countermeasures Installed Poor 1970 85
WALKER RVR Nevada Scour Critical — Countermeasures Installed Fair 1900 61
HUMBOLDT RIVER Nevada Scour Critical — Countermeasures Installed Good 1991 50
PIT TAYLOR CANAL Nevada Scour Critical — Countermeasures Installed Fair 1900 50
EASTGATE WASH Nevada Scour Critical — Countermeasures Installed Fair 1935 40
TRUCKEE-CARSON CANAL Nevada Scour Critical — Countermeasures Installed Fair 1948 11

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