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.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| DRY WASH | Nevada | Scour Critical — Countermeasures Ineffective | Fair | 1993 | 91,000 |
| Pittman Wash-Bermuda | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 19,100 |
| Pittman Wash-South | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 19,100 |
| CentennialPkwyChannel W | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2018 | 6,350 |
| Truckee Canal | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 2,550 |
| Pittman Wash Ped Trail | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 2,000 |
| Pittman Wash | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 2,000 |
| SR 396 & SPRR | Nevada | Scour Critical — Countermeasures Ineffective | Fair | 1981 | 1,300 |
| N Fork Humboldt Rvr | Nevada | Scour Critical — Countermeasures Ineffective | Good | 2024 | 200 |
| UPRR & TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1990 | 27,000 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1971 | 22,200 |
| MUDDY RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1962 | 19,250 |
| MUDDY RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1962 | 19,250 |
| TRUCKEE RIVER & SPRR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1964 | 18,750 |
| TRUCKEE RIVER & SPRR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1964 | 18,750 |
| HUMBOLDT RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1979 | 18,400 |
| CARSON RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1980 | 16,800 |
| CRADLEBAUGH SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Fair | 1968 | 16,750 |
| CARSON RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1968 | 16,750 |
| CARSON RVR | Nevada | Scour Critical — Countermeasures Installed | Good | 1987 | 16,750 |
| CRADLEBAUGH SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Fair | 1987 | 16,750 |
| LAS VEGAS WASH | Nevada | Scour Critical — Countermeasures Installed | Fair | 1978 | 16,700 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1962 | 16,500 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1962 | 16,500 |
| LAS VEGAS WASH | Nevada | Scour Critical — Countermeasures Installed | Good | 1979 | 16,000 |
| AIRPORT SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Fair | 1965 | 14,800 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1961 | 13,950 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1961 | 13,950 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1921 | 13,000 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Poor | 1966 | 12,800 |
| E FORK CARSON RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1951 | 12,800 |
| COTTONWOOD SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Good | 1952 | 12,800 |
| TOQUOP WASH | Nevada | Scour Critical — Countermeasures Installed | Good | 1954 | 12,400 |
| TOQUOP WASH | Nevada | Scour Critical — Countermeasures Installed | Fair | 1965 | 12,400 |
| DUCK CRK | Nevada | Scour Critical — Countermeasures Installed | Good | 1974 | 12,000 |
| DUCK CRK | Nevada | Scour Critical — Countermeasures Installed | Good | 1974 | 12,000 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1980 | 11,200 |
| ROCKY SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Good | 1957 | 9,850 |
| EAST FORK CARSON RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1981 | 9,100 |
| ROCKY SLOUGH | Nevada | Scour Critical — Countermeasures Installed | Good | 1987 | 9,100 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1971 | 8,750 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1966 | 7,950 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1966 | 7,950 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Poor | 1937 | 7,600 |
| WATER ST SP&UPRR&HMBLT R | Nevada | Scour Critical — Countermeasures Installed | Good | 1980 | 6,900 |
| TRUCKEE RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1937 | 6,900 |
| TRUCKEE RIVER | Nevada | Scour Critical — Countermeasures Installed | Fair | 1989 | 6,800 |
| HUMBOLDT RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1986 | 6,550 |
| MUDDY RVR | Nevada | Scour Critical — Countermeasures Installed | Fair | 1944 | 5,300 |
| RED ROCK WASH | Nevada | Scour Critical — Countermeasures Installed | Good | 1985 | 5,000 |
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.