Scour Critical Bridges in Montana

166 bridges in Montana 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 166 bridges in Montana have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
WILLOW CREEK 061	Montana	Scour Critical — Countermeasures Installed	Poor	1942	100
HIGHWOOD CREEK 060	Montana	Scour Critical — Countermeasures Installed	Fair	1986	100
COAL CREEK 027	Montana	Scour Critical — Countermeasures Installed	Poor	1950	100
COAL CREEK 038	Montana	Scour Critical — Countermeasures Installed	Poor	1971	100
BAD ROUTE CREEK 028	Montana	Scour Critical — Countermeasures Installed	Fair	1985	100
N FK THIRTEN MILE CR 091	Montana	Scour Critical — Countermeasures Installed	Poor	1983	100
WARM SPRINGS CREEK 016	Montana	Scour Critical — Countermeasures Installed	Poor	1912	100
WARM SPRINGS CREEK 078	Montana	Scour Critical — Countermeasures Installed	Fair	1980	100
SALT CREEK 053	Montana	Scour Critical — Countermeasures Installed	Fair	1984	100
ARMELLS CREEK 115	Montana	Scour Critical — Countermeasures Installed	Fair	1977	100
BIG SPRING CREEK 033	Montana	Scour Critical — Countermeasures Installed	Good	2009	100
JEFFERSON RIVER 063	Montana	Scour Critical — Countermeasures Installed	Poor	1894	100
MARIAS RIVER 030	Montana	Scour Critical — Countermeasures Installed	Fair	1968	100
LOUSE CREEK 037	Montana	Scour Critical — Countermeasures Installed	Good	2009	100
POST CREEK 075	Montana	Scour Critical — Countermeasures Installed	Fair	1920	100
ELK CREEK 029	Montana	Scour Critical — Countermeasures Installed	Fair	1915	100
TEN MILE CREEK 131	Montana	Scour Critical — Countermeasures Installed	Fair	2005	100
PONDERA COULEE 013	Montana	Scour Critical — Countermeasures Installed	Fair	1977	100
KEELER CREEK 087	Montana	Scour Critical — Countermeasures Installed	Fair	1974	100
SHADE CREEK 019	Montana	Scour Critical — Countermeasures Installed	Fair	1970	100
RUBY RIVER 019	Montana	Scour Critical — Countermeasures Installed	Poor	1976	100
RUBY RIVER 058	Montana	Scour Critical — Countermeasures Installed	Fair	1960	100
MUSSELSHELL RIVER 022	Montana	Scour Critical — Countermeasures Installed	Poor	1986	100
PACKER CREEK 008	Montana	Scour Critical — Countermeasures Installed	Fair	1957	100
CLARK FORK 093	Montana	Scour Critical — Countermeasures Installed	Fair	1956	100
CLEARWATER RIVER 083	Montana	Scour Critical — Countermeasures Installed	Good	1964	100
SWAN RIVER 045	Montana	Scour Critical — Countermeasures Installed	Fair	1954	100
SHIELDS RIVER 018	Montana	Scour Critical — Countermeasures Installed	Poor	1960	100
FLATHEAD CREEK 020	Montana	Scour Critical — Countermeasures Installed	Fair	1912	100
ROCK CREEK 025	Montana	Scour Critical — Countermeasures Installed	Poor	1967	100
COTTONWOOD CREEK 028	Montana	Scour Critical — Countermeasures Installed	Fair	1968	100
SHIELDS RIVER 015	Montana	Scour Critical — Countermeasures Installed	Fair	1975	100
COTTONWOOD CREEK 026	Montana	Scour Critical — Countermeasures Installed	Fair	1970	100
WHITEWATER CREEK 110	Montana	Scour Critical — Countermeasures Installed	Poor	1977	100
BIRCH CREEK 001	Montana	Scour Critical — Countermeasures Installed	Fair	1976	100
DUPUYER CREEK 067	Montana	Scour Critical — Countermeasures Installed	Fair	1938	100
BEAR CREEK 015	Montana	Scour Critical — Countermeasures Installed	Poor	1936	100
SKALKAHO CREEK 043	Montana	Scour Critical — Countermeasures Installed	Fair	1979	100
HARDSCRABBLE CREEK 041	Montana	Scour Critical — Countermeasures Installed	Poor	1945	100
FOUR MILE CREEK 062	Montana	Scour Critical — Countermeasures Installed	Fair	1983	100
SHEEP CREEK 061	Montana	Scour Critical — Countermeasures Installed	Good	1999	100
BEAVER CREEK 022	Montana	Scour Critical — Countermeasures Installed	Fair	1982	100
LAKE CREEK 078	Montana	Scour Critical — Countermeasures Installed	Good	1983	100
ROCK CREEK 098	Montana	Scour Critical — Countermeasures Installed	Fair	1955	100
WEST FORK POPLAR R 026	Montana	Scour Critical — Countermeasures Installed	Fair	1975	100
ANTELOPE CREEK 019	Montana	Scour Critical — Countermeasures Installed	Fair	1931	100
YELLOWSTONE RIVER 020	Montana	Scour Critical — Countermeasures Installed	Fair	1991	100
CANYON CREEK 042	Montana	Scour Critical — Countermeasures Installed	Fair	1965	100
JEFFERSON RIVER 046	Montana	Scour Critical — Countermeasures Installed	Fair	1898	87
PEOPLE`S CREEK 105	Montana	Scour Critical — Countermeasures Installed	Good	2015	86

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.

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