Scour Critical Bridges in Wyoming

51 bridges in Wyoming 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 51 bridges in Wyoming have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
LITTLE ROCK CREEK	Wyoming	Scour Critical — Unaddressed	Poor	1976	50
LITTLE BEAR CREEK	Wyoming	Scour Critical — Countermeasures Ineffective	Fair	2018	1,775
Bull Lake Dam Spillway	Wyoming	Scour Critical — Countermeasures Ineffective	Poor	1938	5
Donkey Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1975	22,352
Laprele Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1958	4,769
Little Boxelder Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1958	4,762
Little Boxelder Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1958	4,762
Laprele Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1958	4,607
Bear River	Wyoming	Scour Critical — Countermeasures Installed	Poor	1941	2,961
Big Horn River	Wyoming	Scour Critical — Countermeasures Installed	Fair	1957	2,711
MADISON RIVER	Wyoming	Scour Critical — Countermeasures Installed	Poor	1958	2,525
YELLOWSTONE RIVER	Wyoming	Scour Critical — Countermeasures Installed	Poor	1961	1,982
LAVA CREEK	Wyoming	Scour Critical — Countermeasures Installed	Fair	1932	1,807
FIREHOLE RIVER	Wyoming	Scour Critical — Countermeasures Installed	Fair	1970	1,807
FOX CREEK	Wyoming	Scour Critical — Countermeasures Installed	Fair	1963	1,775
CRAZY CREEK	Wyoming	Scour Critical — Countermeasures Installed	Fair	1965	1,775
Skull Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	1958	1,753
Little Goose Creek	Wyoming	Scour Critical — Countermeasures Installed	Poor	1970	1,708
Little Goose Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1946	1,679
INDEX CREEK	Wyoming	Scour Critical — Countermeasures Installed	Fair	1963	1,600
Floodwater Creek	Wyoming	Scour Critical — Countermeasures Installed	Poor	1946	1,530
Well Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1956	1,326
Donkey Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1956	1,326
Donkey Creek Overflow	Wyoming	Scour Critical — Countermeasures Installed	Fair	1952	1,326
Donkey Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1956	1,326
SMALL STREAM	Wyoming	Scour Critical — Countermeasures Installed	Fair	1960	800
Prairie Dog Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	1956	583
Box Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	1998	529
Chugwater Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1954	307
Smiths Fork River	Wyoming	Scour Critical — Countermeasures Installed	Fair	1991	271
Medicine Lodge Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1948	216
S Fork Little Wind River	Wyoming	Scour Critical — Countermeasures Installed	Fair	1960	193
N Fork Little Wind River	Wyoming	Scour Critical — Countermeasures Installed	Good	1960	193
Middle Fork Bear Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1922	182
Twin Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1959	153
Laprele Creek	Wyoming	Scour Critical — Countermeasures Installed	Poor	1992	147
Bitter Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1966	130
Crazy Woman Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	1987	98
Otter Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1956	96
Smiths Fork River	Wyoming	Scour Critical — Countermeasures Installed	Fair	1989	73
Laramie River	Wyoming	Scour Critical — Countermeasures Installed	Good	1977	69
Big Sandy River	Wyoming	Scour Critical — Countermeasures Installed	Poor	1982	60
Boozer Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	1999	60
Horse Creek	Wyoming	Scour Critical — Countermeasures Installed	Fair	1946	44
STRAWBERRY CREEK	Wyoming	Scour Critical — Countermeasures Installed	Fair	2005	40
Salt Creek	Wyoming	Scour Critical — Countermeasures Installed	Poor	2008	40
Little Missouri River	Wyoming	Scour Critical — Countermeasures Installed	Fair	1986	38
NOWATER CREEK	Wyoming	Scour Critical — Countermeasures Installed	Good	1997	30
Muddy Creek	Wyoming	Scour Critical — Countermeasures Installed	Good	2007	25
Twin Creek	Wyoming	Scour Critical — Countermeasures Installed	Poor	1932	8

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.

All Bridges Poor Condition Historic Bridges Bridge Stats