Scour Critical Bridges in South Dakota

207 bridges in South Dakota 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 207 bridges in South Dakota have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
CREEK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1940	213
DAN POWELL CK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1936	210
BAD RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1990	210
PEG MUNKY RUN CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1961	200
TURKEY RIDGE CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1986	200
JORGENSON RIVER	South Dakota	Scour Critical — Countermeasures Installed	Fair	1939	198
N. FORK WHETSTONE RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1938	195
SPLIT ROCK CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1981	194
PONCA CK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1952	189
COBB CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1961	179
COBB CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1956	157
W. FORK OF VERMILLION RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1925	157
OAK CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1968	156
NORTH FORK GRAND RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1975	155
MEDICINE CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1962	152
WOLF CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1930	150
STINKINGWATER CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1969	149
MUD CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1977	146
CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1977	146
N FORK OF SNAKE CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1951	144
MONIGHAN CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1954	143
MOREAU RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1969	143
THUNDER BUTTE CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1969	143
MOCCASIN CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1958	141
HIDEWOOD CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1966	130
CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1959	129
CHEYENNE RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1964	128
ANTELOPE CK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1951	128
EMANUEL CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1936	127
CROW CREEK DITCH	South Dakota	Scour Critical — Countermeasures Installed	Fair	1957	125
CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1929	125
FLANDREAU CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1956	125
DOG EAR CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1959	110
CAIN CREEK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1930	105
BEAR CREEK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1960	103
CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1924	101
CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1953	89
LANCE CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1972	85
SAND CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1959	71
JORGENSON RIVER	South Dakota	Scour Critical — Countermeasures Installed	Fair	1981	68
WHITEWOOD CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1966	65
WHETSTONE RV	South Dakota	Scour Critical — Countermeasures Installed	Poor	1978	57
CAIN CREEK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1978	56
WHITE HORSE CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1957	55
BIG SIOUX RV	South Dakota	Scour Critical — Countermeasures Installed	Fair	1948	52
INDIAN RV	South Dakota	Scour Critical — Countermeasures Installed	Poor	1932	52
SPLIT ROCK CREEK	South Dakota	Scour Critical — Countermeasures Installed	Good	1994	52
PRAIRIE DOG CK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1920	50
LITTLE PRAIRIE DOG CK	South Dakota	Scour Critical — Countermeasures Installed	Poor	1920	50
ROCK CK	South Dakota	Scour Critical — Countermeasures Installed	Fair	1985	35

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