Scour-Critical Bridges in Wisconsin

Wisconsin has 749 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.

How this ranking works

This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.

Bridge	County	Scour Rating	Daily Traffic	Condition
Lrd Stewart AVE over Wisconsin River 31	Marathon	3 — Serious	28,144	Poor
Cth Oo over Bongers Creek	Outagamie	3 — Serious	20,705	Fair
Lrd S 43rd ST over Kinnickinnick River	Milwaukee	3 — Serious	19,025	Poor
Lrd N 35th ST over Lincoln Creek	Milwaukee	3 — Serious	13,774	Fair
Cth Q over Bark River	Washington	3 — Serious	10,200	Fair
Sth 124-jefferson over Duncan Creek	Chippewa	3 — Serious	9,920	Poor
Lrd Racine Street over Spring Brook	Rock	3 — Serious	9,900	Fair
Cth Eastern Ave. over Mullet River	Sheboygan	3 — Serious	9,800	Good
Lrd Goatsville RD over Kelly Brook	Oconto	3 — Serious	8,600	Fair
Lrd Wright RD over Spring Brook	Rock	3 — Serious	8,300	Fair
Cth Ss S/b over Meadows Creek	Barron	3 — Serious	8,200	Fair
Ush 14/61-sth 16 over Lrd Cross & 2nd ST -miss	La Crosse	3 — Serious	7,750	Fair
Sth 13 over Whittlesey Creek	Bayfield	3 — Serious	7,500	Fair
Sth 44 over Eight Mile Creek	Winnebago	3 — Serious	7,500	Fair
Sth 13 over Carter Creek	Adams	3 — Serious	7,100	Fair
Ush 141-sth 29 over Br Sorensons Creek	Brown	3 — Serious	6,700	Good
Sth 57 Nb\|sth 28 E over Onion River	Sheboygan	3 — Serious	6,500	Good
Lrd S 1st ST over Kinnickinnic River	Milwaukee	3 — Serious	6,113	Fair
Lrd Watertown RD over Fox River	Waukesha	3 — Serious	6,100	Fair
Lrd Main ST over Spring Creek	Calumet	3 — Serious	5,900	Poor
Cth S over Duck Creek	Outagamie	3 — Serious	5,900	Good
Lrd Geneva ST over Southwick Creek	Walworth	3 — Serious	5,900	Fair
Cth N over Branch Apple Creek	Outagamie	3 — Serious	5,800	Good
Cth A over Mackville Creek	Outagamie	3 — Serious	5,757	Fair
Ush 10-main ST over Mud Creek	Manitowoc	3 — Serious	5,500	Fair
Cth A over Pratt Creek	Dodge	3 — Serious	5,400	Fair
Cth Wg over Br Dutch Gap Canal	Kenosha	3 — Serious	5,200	Poor
Cth M Nash ST over Black Otter Creek	Outagamie	3 — Serious	5,151	Fair
Ush 45 over Mosher Creek	Fond du Lac	3 — Serious	5,100	Fair
Ush 45 over Marshy Creek	Fond du Lac	3 — Serious	5,100	Fair
Lrd Indiana ST over Milwaukee River	Washington	3 — Serious	5,100	Fair
Lrd W 2nd ST over Oconomowoc River	Waukesha	3 — Serious	4,664	Fair
Lrd Division RD over Jefferson Ditch	Washington	3 — Serious	4,600	Fair
Lrd Main ST over Bark River	Waukesha	3 — Serious	4,600	Fair
Ush12-sth16 over Webster Creek	Juneau	3 — Serious	4,500	Fair
Lrd Sherman AVE over Yahara River	Dane	3 — Serious	4,450	Fair
Cth Bb W Rawson Av over Br Root River	Milwaukee	3 — Serious	4,300	Fair
Lrd 5th ST over Quaderers Creek	Barron	3 — Serious	4,200	Fair
Ush 45 over Brockway Creek	Fond du Lac	3 — Serious	4,200	Fair
Sth 13 over Onion River	Bayfield	3 — Serious	4,100	Good
Sth 32 Nb-sth 57 N over Sheboygan River	Manitowoc	3 — Serious	4,050	Fair
Lrd Main ST over Bay City Creek	Ashland	3 — Serious	3,909	Fair
Lrd Hickory ST over W Br Fond Du Lac River	Fond du Lac	3 — Serious	3,900	Poor
Lrd Promen DR over Lakeside Creek	Fond du Lac	3 — Serious	3,900	Poor
Lrd Park AVE over Lakeside Creek	Fond du Lac	3 — Serious	3,900	Fair
Lrd Washington ST over Swan Creek	Walworth	3 — Serious	3,900	Fair
Cth O/n Green Bay over Mole Creek	Ozaukee	3 — Serious	3,800	Good
Cth L over Bearskin Creek	Oneida	3 — Serious	3,642	Poor
Ush 45 over Shank Creek	Fond du Lac	3 — Serious	3,200	Fair
Lrd Scott ST over De Neveu Creek	Fond du Lac	3 — Serious	3,100	Poor
Lrd Broadway ST over Onion River	Sheboygan	3 — Serious	3,100	Fair
Lrd Sherman RD over Br Cedar Creek	Washington	3 — Serious	3,100	Fair
Lrd Muskego Dam RD over Muskego Canal	Waukesha	3 — Serious	3,100	Fair
Lrd Lisbon RD over Butler Ditch	Waukesha	3 — Serious	2,900	Fair
Lrd Bridgewater Av over Duncan Creek	Chippewa	3 — Serious	2,855	Poor
Lrd South Lawson D over Puchyan River	Green Lake	3 — Serious	2,769	Poor
Cth J over Otter Creek	Sheboygan	3 — Serious	2,700	Fair
Cth A over Br Yellow River	Wood	3 — Serious	2,700	Poor
Lrd Minnesota AVE over Mosher Creek	Fond du Lac	3 — Serious	2,616	Fair
Cth S over Br Bear Creek	Outagamie	3 — Serious	2,600	Fair
Lrd Perkins ST over Black River	Taylor	3 — Serious	2,600	Fair
Cth A over Cambra Creek	Dodge	3 — Serious	2,500	Fair
Lrd 2nd ST over De Neveu Creek	Fond du Lac	3 — Serious	2,500	Poor
Lrd Division ST over E Br Fond Du Lac River	Fond du Lac	3 — Serious	2,500	Fair
Ush 12-sth 16 over Little Lemonweir River	Juneau	3 — Serious	2,500	Fair
Cth C over Br Duck Creek	Outagamie	3 — Serious	2,500	Good
Lrd Palmer DR over Spring Brook	Rock	3 — Serious	2,500	Fair
Cth Bb over Killsnake River	Calumet	3 — Serious	2,400	Fair
Lrd Seymour ST over W Br Fond Du Lac River	Fond du Lac	3 — Serious	2,400	Poor
Cth E over Onion River	Sheboygan	3 — Serious	2,400	Fair
Cth Bb over Tainter Lake	Dunn	3 — Serious	2,234	Poor
Sth 107 over Br W Fk Little Rib River	Marathon	3 — Serious	2,200	Fair
Cth O over Ashippun River	Dodge	3 — Serious	2,100	Fair
Lrd Grand ST over S Br Manitowoc River	Calumet	3 — Serious	1,997	Poor
Cth D over Chetek River	Barron	3 — Serious	1,900	Fair
Lrd 1st ST over E Br Fond Du Lac River	Fond du Lac	3 — Serious	1,900	Poor
Lrd Forest AVE over E Br Fond Du Lac River	Fond du Lac	3 — Serious	1,900	Poor
Lrd Old Green Bay over N Br Pike River	Kenosha	3 — Serious	1,900	Fair
Cth Es over Honey Creek	Walworth	3 — Serious	1,900	Fair
Lrd Juneau BLVD over Underwood Creek	Waukesha	3 — Serious	1,900	Good
Lrd 2nd AVE over Spring Brook	Langlade	3 — Serious	1,803	Fair
Lrd Oak Creek Park over Oak Creek	Milwaukee	3 — Serious	1,762	Fair
Lrd 43rd ST over Root River	Racine	3 — Serious	1,762	Poor
Cth W over Little Peshtigo River	Marinette	3 — Serious	1,700	Poor
Lrd 7th AVE over Spring Brook	Langlade	3 — Serious	1,699	Poor
Sth TH 23 over ST Louis River	Douglas	3 — Serious	1,650	Fair
Lrd W Cherry ST over Milwaukee River	Milwaukee	3 — Serious	1,650	Poor
Cth G over Bridge Creek	Eau Claire	3 — Serious	1,646	Poor
Cth Cc over Br Ross Crossing Creek	Green	3 — Serious	1,600	Poor
Cth A Mills ST over Puckyan River	Green Lake	3 — Serious	1,600	Poor
Cth H over Apple River	Polk	3 — Serious	1,600	Poor
Cth V over S Br Yellow River	Wood	3 — Serious	1,600	Good
Lrd Guns Street over Willow Creek	Brown	3 — Serious	1,500	Fair
Cth Bb over Koshkonong Creek	Dane	3 — Serious	1,500	Poor
Lrd N Shore RD over Delavan Lake	Walworth	3 — Serious	1,500	Fair
Cth C over W Br Lt Eau Pleine River	Marathon	3 — Serious	1,465	Fair
Cth C over E Br Lt Eau Pleine River	Marathon	3 — Serious	1,465	Fair
Cth N over Otter Creek	Rock	3 — Serious	1,461	Poor
Cth Xx over Meeme River	Manitowoc	3 — Serious	1,400	Fair
Cth G over Br Cedar Creek	Washington	3 — Serious	1,391	Poor
Cth V over Yellow River	Wood	3 — Serious	1,300	Fair
Cth F over Mccaslin Brook	Oconto	3 — Serious	1,200	Good
Lrd Park AVE over Spring Creek	Calumet	3 — Serious	1,175	Fair
Lrd Industrial Dri over Pine River Watershed	Richland	3 — Serious	1,125	Good
Ush 8 over N Br Pike River	Marinette	3 — Serious	1,100	Fair
Cth M over Little River	Oconto	3 — Serious	1,100	Fair
Cth G over Miller Creek	Shawano	3 — Serious	1,100	Fair
Cth N over Honey Creek	Walworth	3 — Serious	1,100	Fair
Cth B over Helen Creek	Vilas	3 — Serious	1,087	Good
Cth D over Chain Echo Channel	Oneida	3 — Serious	1,074	Fair
Lrd Cth Pp over Mullet River	Sheboygan	3 — Serious	1,040	Fair
Lrd Santa Monica D over Sorenson Creek	Brown	3 — Serious	1,000	Good
Lrd W 12th ST over E Br Fond Du Lac River	Fond du Lac	3 — Serious	1,000	Fair
Cth H over Little Otter Creek	Chippewa	3 — Serious	975	Poor
Lrd W Bluff ST over Furnace Branch	Grant	3 — Serious	940	Fair
Cth Ee over Fisherman Creek	Sheboygan	3 — Serious	940	Fair
Lrd Chaffee ST over Oconomowoc River	Waukesha	3 — Serious	940	Fair
Cth N over Bearpen Coulee Creek	Pepin	3 — Serious	925	Fair
Lrd Rybeck RD over Bark River	Waukesha	3 — Serious	910	Fair
Cth G over Castle Rock Flowage	Juneau	3 — Serious	904	Fair
Cth G over Lau Creek	Dodge	3 — Serious	880	Fair
Cth N over Butler Creek	Dodge	3 — Serious	880	Poor
Cth B over Honey Creek	Green	3 — Serious	860	Poor
Cth B over Br Honey Creek	Green	3 — Serious	860	Poor
Cth J over Pratt Creek	Dodge	3 — Serious	822	Fair
Lrd Bridge ST over Grand River	Green Lake	3 — Serious	820	Fair
Cth A over N Br Milwaukee River	Sheboygan	3 — Serious	799	Fair
Cth H over Schoolhouse Creek	Eau Claire	3 — Serious	793	Fair
Cth B over Nebagamon Creek	Douglas	3 — Serious	790	Poor
Sth 191-5th ST over Dodge Branch	Iowa	3 — Serious	790	Fair
Lrd S Stafford ST over Mullet River	Sheboygan	3 — Serious	790	Poor
Sth 40 over Clear Creek	Rusk	3 — Serious	770	Fair
Lrd 7th ST over Beaver Creek	Brown	3 — Serious	763	Fair
Cth K over Cattail Valley Creek	Juneau	3 — Serious	750	Good
Lrd Jay DR over N Br Milwaukee River	Washington	3 — Serious	750	Poor
Cth-ff over Eight Mile Creek	Winnebago	3 — Serious	730	Poor
Cth F over Wapogasset Branch	Polk	3 — Serious	720	Poor
Cth A over S Fk Hay Creek	Barron	3 — Serious	719	Fair
Cth K over Little Eau Pleine River	Clark	3 — Serious	672	Good
Lrd Stow ST over De Neveu Creek	Fond du Lac	3 — Serious	650	Poor
Cth Ml over Des Plaines River	Kenosha	3 — Serious	650	Fair
Cth M over Mill Creek	Shawano	3 — Serious	650	Fair
Sth 162-n Ridge RD over Br Coon Creek	Vernon	3 — Serious	650	Poor
Lrd Hayton RD over Pine Creek	Calumet	3 — Serious	640	Fair
Cth Q over Rheingan Creek	Chippewa	3 — Serious	640	Good
Cth Cj over Dutch Gap Canal	Kenosha	3 — Serious	640	Fair
Cth S over Br Big Rib River	Marathon	3 — Serious	634	Poor
Cth A over N Br Crawfish River	Columbia	3 — Serious	630	Fair
Lrd Buchanan RD over Apple Creek	Outagamie	3 — Serious	625	Poor
Cth S over Trout Creek	Chippewa	3 — Serious	610	Good
Cth Q over E Br Big Sandy Creek	Marathon	3 — Serious	602	Poor
Cth Q over Little Sandy Creek	Marathon	3 — Serious	600	Fair
Cth G over S Br Little Wolf River	Waupaca	3 — Serious	597	Good
Cth Fw over Beaver Creek	Dodge	3 — Serious	587	Fair
Lrd 2nd ST over E Br Fond Du Lac River	Fond du Lac	3 — Serious	587	Fair
Lrd Neitzke RD over S Br Pigeon River	Waupaca	3 — Serious	565	Good
Cth C over Wausaukee River	Marinette	3 — Serious	560	Poor
Sth 162 over Hohlfeld Coulee Creek	Vernon	3 — Serious	550	Fair
Cth O over Stewart Creek	Juneau	3 — Serious	540	Good
Lrd Liberty ST over Br Bonner Branch	Lafayette	3 — Serious	540	Fair
Sth 121 over N Br Trempealeau River	Jackson	3 — Serious	530	Fair
Cth J over Dent Creek	Shawano	3 — Serious	530	Fair
Cth P over Deer Tail Creek	Rusk	3 — Serious	529	Poor
Cth C over Rocky Creek	Wood	3 — Serious	510	Fair
Cth C over Yellow River	Wood	3 — Serious	510	Fair
Cth Cm over Fox River	Columbia	3 — Serious	500	Poor
Lrd Service RD (de over Lakeside Park Lagoon	Fond du Lac	3 — Serious	500	Fair
Cth P over Rock Creek	Marathon	3 — Serious	500	Fair
Cth P over Peshtigo River	Marinette	3 — Serious	500	Poor
Lrd W Vienna AVE over Grandtosa Creek	Milwaukee	3 — Serious	500	Fair
Cth G over Mud Branch	Lafayette	3 — Serious	490	Fair
Lrd Center DR over Fox River	Waukesha	3 — Serious	490	Poor
Cth Hh over Hemlock Creek	Wood	3 — Serious	485	Poor
Cth Pp over Br Mullet River	Sheboygan	3 — Serious	480	Poor
Cth Hh over Br Hemlock Creek	Wood	3 — Serious	480	Poor
Cth E over Mill Creek	Wood	3 — Serious	479	Fair
Cth E over Br Hemlock Creek	Wood	3 — Serious	479	Fair
Lrd Lathers RD over Turtle Creek	Rock	3 — Serious	474	Poor
Lrd S Wind Lake RD over Windlake Drainage Canal	Racine	3 — Serious	470	Poor
Lrd Memorial Circl over Pigeon River	Waupaca	3 — Serious	461	Good
Cth Cc over Br N Fk Beaver Creek	Trempealeau	3 — Serious	455	Fair
Lrd E Dyreson RD over Yahara River	Dane	3 — Serious	450	Fair
Cth T over Branch Of Elk Creek	Chippewa	3 — Serious	440	Good
Cth M over Br Pecatonica River	Lafayette	3 — Serious	434	Fair
Cth H over Eagle Lake	Bayfield	3 — Serious	431	Poor
Lrd Learning Pi (m over Koshkonong Creek	Dane	3 — Serious	430	Good
Lrd Mill ST over S Br Little Wolf River	Waupaca	3 — Serious	421	Good
Cth C over E Br Honey Creek	Sauk	3 — Serious	420	Fair
Lrd Watson ST over Spring Brook	Langlade	3 — Serious	414	Fair
Lrd Shearer ST over Waupaca River	Waupaca	3 — Serious	414	Good
Cth Ks over Br Richland Creek	Green	3 — Serious	411	Poor
Cth F over Pensaukee River	Shawano	3 — Serious	410	Fair
Cth Hh over White Hollow Creek	Iowa	3 — Serious	400	Poor
Lrd Wheeler Road over Br Mud Creek	Outagamie	3 — Serious	400	Good
Lrd Midland DR over Kohlsville River	Washington	3 — Serious	395	Poor
Lrd Deerview RD over Toad Creek	Outagamie	3 — Serious	392	Fair
Cth Oo over S Br Embarass River	Shawano	3 — Serious	390	Poor
Cth M over Br E Br Pecatonica River	Lafayette	3 — Serious	380	Poor
Cth Y over Br N Fk Bad Axe River	Vernon	3 — Serious	379	Fair
Cth J over Fall Creek	Eau Claire	3 — Serious	367	Fair