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
JOHN BROWN CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1955	260
DOLORES RIVER	Colorado	Scour Critical — Countermeasures Installed	Fair	1958	260
DOLORES RIVER	Colorado	Scour Critical — Countermeasures Installed	Fair	1953	253
COYOTE CREEK	Colorado	Scour Critical — Countermeasures Installed	Poor	1948	240
SIX MILE CREEK	Colorado	Scour Critical — Countermeasures Installed	Poor	1948	220
SOUTH HARDSCRABBLE CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1959	200
DRAW	Colorado	Scour Critical — Countermeasures Installed	Fair	1935	200
DRAW	Colorado	Scour Critical — Countermeasures Installed	Fair	1935	200
N. Fork Michigan River	Colorado	Scour Critical — Countermeasures Installed	Fair	2006	184
SOUTH PLATTE RIVER	Colorado	Scour Critical — Countermeasures Installed	Fair	1990	166
WEST KIOWA CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1986	165
DRY CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1976	160
VACHITA CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1958	150
BUFFALO CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1957	147
BEAR CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1972	146
PLEASANT VALLEY DRAIN	Colorado	Scour Critical — Countermeasures Installed	Poor	1960	141
RIO GRANDE	Colorado	Scour Critical — Countermeasures Installed	Good	1984	130
CHACUACO CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1934	130
TOBE CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1934	130
FIRST CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1950	129
LAPIN CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1980	127
North St. Vrain Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1927	122
SARCILLO CANYON CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1983	122
LAKE FORK CREEK	Colorado	Scour Critical — Countermeasures Installed	Poor	1954	120
Sneffels Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	2007	120
BEAR CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1987	117
BEATY CREEK	Colorado	Scour Critical — Countermeasures Installed	Poor	1938	110
EAST BIJOU CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1965	105
ALAMOSA RIVER	Colorado	Scour Critical — Countermeasures Installed	Poor	1968	102
Laramie River	Colorado	Scour Critical — Countermeasures Installed	Fair	1940	95
Morgan Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1995	90
WOLF CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1950	87
Elk River	Colorado	Scour Critical — Countermeasures Installed	Fair	1980	86
S Frk Cache La Poudre Rv	Colorado	Scour Critical — Countermeasures Installed	Fair	1971	86
Little Beaver Creek	Colorado	Scour Critical — Countermeasures Installed	Poor	1972	86
EAST BIJOU CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1965	82
TRIBUTARY SALADO CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1950	80
BUFFALO CREEK	Colorado	Scour Critical — Countermeasures Installed	Poor	1938	80
RATON CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1930	75
Middle Boulder Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1917	70
Middle Boulder Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1917	66
ARIKAREE RIVER	Colorado	Scour Critical — Countermeasures Installed	Good	2011	65
TRIB. BURRO CANYON CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1936	64
WILSON CREEK TRIBUTARY	Colorado	Scour Critical — Countermeasures Installed	Fair	1965	63
N. Poudre Canal/Park Cr.	Colorado	Scour Critical — Countermeasures Installed	Fair	1970	59
Middle St. Vrain Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1927	56
APISHAPA RIVER	Colorado	Scour Critical — Countermeasures Installed	Fair	1930	54
CORNET CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	2006	50
EAST BIJOU CREEK	Colorado	Scour Critical — Countermeasures Installed	Fair	1964	48
N Fork Frenchman Creek	Colorado	Scour Critical — Countermeasures Installed	Fair	1967	48

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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