Scour Critical Bridges in Illinois

99 bridges in Illinois 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 99 bridges in Illinois have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
CLEAR CR	Illinois	Scour Critical — Unaddressed	Fair	1978	100
CLAYPOOL DR DITCH	Illinois	Scour Critical — Unaddressed	Poor	1916	100
BR CROW CREEK	Illinois	Scour Critical — Unaddressed	Poor	1930	25
SALT CREEK	Illinois	Scour Critical — Countermeasures Ineffective	Good	2017	27,100
I-294/I-90/Willow Creek	Illinois	Scour Critical — Countermeasures Ineffective	Fair	1958	26,000
I-294/I-90/Willow Creek	Illinois	Scour Critical — Countermeasures Ineffective	Fair	1958	12,400
DUTCH GAP CANAL	Illinois	Scour Critical — Countermeasures Ineffective	Fair	1960	4,850
La Moine River	Illinois	Scour Critical — Countermeasures Ineffective	Good	2003	150
STREAM	Illinois	Scour Critical — Countermeasures Ineffective	Fair	1953	75
Mauvaise Terre Creek	Illinois	Scour Critical — Countermeasures Ineffective	Good	2024	50
DITCH	Illinois	Scour Critical — Countermeasures Ineffective	Good	1997	50
Little Sandy Creek	Illinois	Scour Critical — Countermeasures Ineffective	Good	2024	50
Rocky Branch	Illinois	Scour Critical — Countermeasures Ineffective	Good	1992	25
ASA CREEK	Illinois	Scour Critical — Countermeasures Ineffective	Fair	1960	12
SALT CR	Illinois	Scour Critical — Countermeasures Installed	Fair	1958	87,550
SALT CR	Illinois	Scour Critical — Countermeasures Installed	Fair	1958	87,550
DES PLAINES RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1959	30,700
DES PLAINES RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1959	30,700
MILL CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1953	29,900
MISSISSIPPI RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1986	25,850
MISSISSIPPI RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1984	25,850
DICKISON RUN CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1958	14,400
ROCK RIV& MADISON ST	Illinois	Scour Critical — Countermeasures Installed	Fair	1925	8,500
3 MILE BRANCH	Illinois	Scour Critical — Countermeasures Installed	Fair	1974	7,850
MISS RIV/RR/MSS6000	Illinois	Scour Critical — Countermeasures Installed	Fair	1874	6,550
MISS RIV/FAU 9416	Illinois	Scour Critical — Countermeasures Installed	Poor	1942	6,250
ROCK RIVER	Illinois	Scour Critical — Countermeasures Installed	Poor	1980	5,750
E FORK LICK CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1962	5,000
MILL CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1932	4,450
ROCK RIVER	Illinois	Scour Critical — Countermeasures Installed	Poor	1966	4,200
WABASH RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1956	3,700
Nashville Creek W Branch	Illinois	Scour Critical — Countermeasures Installed	Fair	1921	3,450
TRIB OF KICKAPOO CR	Illinois	Scour Critical — Countermeasures Installed	Fair	1928	2,550
MISSISSIPPI RIVER	Illinois	Scour Critical — Countermeasures Installed	Poor	1927	2,500
MAUVAISE TERRE CR	Illinois	Scour Critical — Countermeasures Installed	Poor	1975	2,150
KYTE CREEK	Illinois	Scour Critical — Countermeasures Installed	Good	1941	2,100
SPOON RIVER	Illinois	Scour Critical — Countermeasures Installed	Poor	1924	1,600
KYTE CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1966	1,600
KYTE CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1978	1,550
FLAG CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1932	1,200
ELKHORN CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1939	1,050
CAMP CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1958	950
PISCASAW CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1967	850
KERFOOT CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1980	775
CAL SLOUGH	Illinois	Scour Critical — Countermeasures Installed	Poor	1963	750
COON CREEK	Illinois	Scour Critical — Countermeasures Installed	Poor	1980	725
BEAVER CR	Illinois	Scour Critical — Countermeasures Installed	Poor	1973	700
SUGAR CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1967	675
ELKHORN CREEK	Illinois	Scour Critical — Countermeasures Installed	Fair	1964	600
SANGAMON RIVER	Illinois	Scour Critical — Countermeasures Installed	Fair	1980	550

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