Scour-Critical Bridges in Minnesota

Minnesota has 240 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
I 694 over Mississippi River	Hennepin	3 — Serious	81,500	Fair
US 14 over Minn River; Trail	Blue Earth	3 — Serious	39,000	Fair
Mn 21 over Cannon River	Rice	3 — Serious	15,200	Fair
I 90 over Cedar River	Mower	3 — Serious	11,649	Fair
CR 18 over Coon Creek	Anoka	3 — Serious	11,229	Good
Csah 12 over Bois De Sioux River	Wilkin	3 — Serious	9,650	Fair
Msas 110 over Minnesota River	Brown	3 — Serious	6,924	Poor
Mn 23 over Stream	Yellow Medicine	3 — Serious	6,889	Good
Mn 15 over Cottonwood River	Brown	3 — Serious	6,200	Fair
Csah 5 over W River Rd; Miss Riv	Hennepin	3 — Serious	6,100	Fair
Csah 52 over Mississippi River; ST	Hennepin	3 — Serious	6,033	Fair
Mn 105 over Turtle Creek	Mower	3 — Serious	5,698	Fair
I 90 over Rock River	Rock	3 — Serious	5,696	Fair
I 90 over Rock River	Rock	3 — Serious	5,696	Fair
Csah 7 over Seelye Brook	Anoka	3 — Serious	5,661	Poor
Csah 61 over Snake River	Pine	3 — Serious	5,576	Poor
Csah 15 over Chippewa River	Chippewa	3 — Serious	5,000	Fair
Mn 43 over Miss Rvr Rr Streets	Winona	3 — Serious	4,905	Fair
Csah 12 over Crow River	Hennepin	2 — Critical	4,800	Fair
Csah 15 over Elk River	Sherburne	3 — Serious	4,450	Fair
Csah 11 over Elk River	Sherburne	3 — Serious	4,400	Fair
US 52 over Rice Creek	Fillmore	3 — Serious	4,193	Good
Csah 6 over Snake River	Kanabec	3 — Serious	3,750	Fair
Mn 15 over N Fk Crow River	Meeker	3 — Serious	3,710	Fair
Csah 62 over Mississippi River	Itasca	3 — Serious	2,550	Fair
Csah 75 over ST Augusta Creek	Stearns	3 — Serious	2,533	Fair
Csah 26 over Platte River	Morrison	3 — Serious	2,350	Fair
US 12 over Chippewa River	Swift	3 — Serious	2,135	Good
Csah 9 over Watonwan River	Watonwan	3 — Serious	1,950	Good
Mn 48 over ST Croix River	Pine	3 — Serious	1,839	Fair
Csah 12 over W Br Rum River	Mille Lacs	3 — Serious	1,700	Poor
Mn 7 over Watson Sag Channel	Chippewa	3 — Serious	1,651	Good
US 59 over Pomme De Terre River	Swift	3 — Serious	1,627	Fair
Csah 18 over W Br Rum River	Mille Lacs	3 — Serious	1,550	Fair
Csah 27 over Watonwan River	Watonwan	3 — Serious	1,500	Fair
Csah 27 over ST James Creek	Watonwan	3 — Serious	1,500	Fair
Csah 27 over Elm Creek	Martin	2 — Critical	1,456	Poor
US 59 over Yellow Medicine River	Yellow Medicine	3 — Serious	1,439	Fair
Csah 35 over Maple River	Blue Earth	3 — Serious	1,400	Fair
Mn 16 over Root River	Fillmore	3 — Serious	1,397	Fair
Mn 76 over S Fk Root River	Houston	3 — Serious	1,386	Fair
Mn 32 over S Br Wild Rice River	Clay	3 — Serious	1,336	Fair
Csah 11 over Rum River	Mille Lacs	3 — Serious	1,300	Fair
Csah 6 over Cottonwood River	Redwood	3 — Serious	1,300	Fair
Csah 7 over Prairie River	Itasca	3 — Serious	1,250	Fair
Csah 34 over N Fk Crow River	Meeker	2 — Critical	1,200	Fair
Mn 61 over Pigeon River	Cook	3 — Serious	1,198	Fair
Csah 9 over High Island Creek	Sibley	3 — Serious	1,165	Fair
Csah 20 over Watonwan River	Blue Earth	3 — Serious	1,160	Fair
Csah 39 over Elm Creek	Martin	2 — Critical	1,153	Poor
Csah 6 over Ann River	Kanabec	2 — Critical	1,100	Fair
Csah 3 over Snake River	Kanabec	3 — Serious	1,100	Fair
Csah 23 over Lac Qui Parle River	Lac qui Parle	3 — Serious	1,100	Fair
Csah 18 over Garden Lake	Lake	3 — Serious	1,000	Good
Csah 2 over S Fk Crow River	McLeod	3 — Serious	1,000	Fair
Csah 11 over Big Cottonwood River	Lyon	3 — Serious	960	Fair
Csah 13 over S Fk Watonwan River	Watonwan	3 — Serious	950	Good
Mn 30 over Blue Earth River	Blue Earth	3 — Serious	782	Fair
Csah 52 over Swan River	Morrison	3 — Serious	780	Fair
M 87 over S Br Mid Fk Zumbro R	Olmsted	3 — Serious	780	Good
Csah 12 over Getchell Creek	Stearns	3 — Serious	780	Fair
CR 252 over Skunk River	Morrison	3 — Serious	766	Fair
CR 135 over Clearwater River	Wright	3 — Serious	736	Fair
Csah 5 over W Br Rum River	Mille Lacs	3 — Serious	690	Fair
M 98 over Sand Creek	Scott	2 — Critical	680	Fair
Mn 73 over Sturgeon River	St. Louis	3 — Serious	680	Fair
Csah 30 over Crow Wing River	Wadena	3 — Serious	667	Good
Csah 1 over Poplar River	Polk	3 — Serious	660	Fair
Csah 23 over S Fk Crow River	Carver	2 — Critical	657	Fair
Csah 12 over Crow Wing River	Wadena	2 — Critical	643	Poor
CR 71 over Seelye Brook	Anoka	3 — Serious	641	Poor
Csah 13 over W Br Rum River	Mille Lacs	3 — Serious	640	Poor
Csah 15 over Pine River	Crow Wing	3 — Serious	620	Fair
Csah 21 over Washington Creek	Meeker	2 — Critical	610	Fair
Csah 8 over Sleepy Eye Creek	Brown	3 — Serious	574	Fair
Csah 5 over N Fk Watonwan River	Watonwan	3 — Serious	570	Fair
Csah 38 over Elm Creek	Martin	2 — Critical	530	Poor
M 91 over Mid Fk Zumbro R	Olmsted	3 — Serious	525	Good
Csah 7 over N Fk Yellow Bank River	Lac qui Parle	2 — Critical	520	Fair
Csah 16 over Big Cobb River	Blue Earth	3 — Serious	510	Good
Csah 52 over Spunk Creek	Stearns	3 — Serious	510	Fair
Csah 1 over Two Rivers	Morrison	3 — Serious	505	Poor
Csah 19 over Elk Creek	Nobles	3 — Serious	500	Fair
Csah 19 over Br Elk Crk	Nobles	3 — Serious	500	Fair
Csah 19 over Stream	Nobles	3 — Serious	500	Fair
Csah 24 over Little Cottonwood River	Brown	3 — Serious	492	Fair
Csah 30 over Red River Of The North	Wilkin	3 — Serious	490	Fair
Csah 8 over Tuttle Lake Outlet	Martin	2 — Critical	480	Poor
Csah 7 over Redwood River	Redwood	3 — Serious	470	Fair
Csah 29 over Maple River	Blue Earth	3 — Serious	465	Poor
Csah 14 over Minnesota River	Chippewa	2 — Critical	460	Fair
Csah 26 over S Fk Crow River	Meeker	2 — Critical	460	Fair
Csah 10 over Stream	Lyon	2 — Critical	445	Fair
Mn 30 over Big Cobb River	Blue Earth	3 — Serious	443	Good
Csah 18 over South Creek	Martin	2 — Critical	435	Poor
Csah 2 over Snake River	Aitkin	3 — Serious	418	Poor
Csah 15 over Des Moines River	Cottonwood	3 — Serious	415	Good
Csah 53 over Elm Creek	Martin	3 — Serious	401	Fair
Csah 2 over Wells Creek	Goodhue	3 — Serious	400	Good
Csah 10 over Dry Run	Houston	3 — Serious	396	Fair
Csah 46 over Moose Horn River	Pine	3 — Serious	394	Poor
Csah 14 over Otter Tail River	Wilkin	2 — Critical	390	Fair
Csah 13 over N Fk Crow River	Stearns	3 — Serious	370	Fair
Csah 19 over Tibbetts Brook	Mille Lacs	3 — Serious	365	Fair
Csah 5 over Mud Creek	Kanabec	2 — Critical	360	Fair
Csah 13 over Watonwan River	Blue Earth	3 — Serious	356	Fair
Csah 10 over Redwood River	Redwood	3 — Serious	355	Fair
Csah 36 over Skunk River	Morrison	3 — Serious	353	Fair
Csah 4 over E Fk Beaver Creek	Renville	3 — Serious	350	Good
Csah 33 over Lac Qui Parle River	Lac qui Parle	3 — Serious	330	Fair
Csah 18 over Maple River	Blue Earth	3 — Serious	328	Fair
Csah 16 over Champepadan Creek	Nobles	3 — Serious	325	Good
Csah 9 over Red Eye River	Wadena	2 — Critical	325	Poor
Csah 30 over N Fk Crow River	Meeker	2 — Critical	310	Fair
Csah 13 over Pipestone Creek	Pipestone	3 — Serious	308	Fair
Csah 22 over Little Cottonwood River	Brown	3 — Serious	300	Good
Csah 8 over S Br Yellow Medicine R	Lyon	2 — Critical	295	Good
Csah 6 over Little Rock River	Nobles	3 — Serious	295	Good
Csah 6 over Stream	Nobles	3 — Serious	295	Fair
Csah 10 over Cottonwood River	Redwood	3 — Serious	295	Poor
CR 151 over Spunk Creek	Stearns	3 — Serious	280	Fair
Csah 38 over Watonwan River	Blue Earth	2 — Critical	276	Fair
CR 59 over Cannon River	Dakota	2 — Critical	276	Fair
Csah 7 over Crow Wing River	Wadena	2 — Critical	276	Fair
Csah 11 over Stream	Fillmore	3 — Serious	270	Fair
Csah 3 over Mississippi River	Cass	3 — Serious	265	Fair
Csah 12 over Clearwater River	Red Lake	3 — Serious	260	Good
Csah 24 over S Fk Yellow Bank River	Lac qui Parle	3 — Serious	255	Fair
Csah 12 over S Fk Watonwan River	Watonwan	3 — Serious	255	Good
Csah 1 over Stream	Lincoln	3 — Serious	251	Fair
Csah 10 over S Fk Watonwan River	Watonwan	3 — Serious	245	Good
Csah 10 over Blue Earth River	Blue Earth	3 — Serious	236	Fair
Csah 3 over Shakopee Creek	Chippewa	3 — Serious	235	Fair
Csah 3 over Ditch	Chippewa	3 — Serious	235	Poor
Csah 2 over Beaver Creek	Renville	2 — Critical	225	Poor
CR 64 over Raven Stream	Scott	3 — Serious	225	Fair
Csah 1 over Middle River	Marshall	3 — Serious	220	Fair
Csah 15 over Minnesota River	Chippewa	3 — Serious	206	Fair
CR 65 over Stream	Nobles	3 — Serious	195	Fair
Csah 3 over Elk Creek	Nobles	3 — Serious	185	Fair
Csah 3 over Elk Creek	Nobles	3 — Serious	185	Poor
Csah 21 over Big Cobb River	Blue Earth	3 — Serious	176	Fair
Csah 8 over Kanaranzi Creek	Nobles	3 — Serious	165	Fair
Csah 28 over Middle River	Marshall	3 — Serious	160	Fair
Csah 47 over Morgan Creek	Blue Earth	3 — Serious	154	Fair
M 58 over Cannon River	Goodhue	3 — Serious	150	Fair
Csah 11 over Hawk Creek	Renville	2 — Critical	150	Poor
Csah 34 over Stony River	Lake	2 — Critical	137	Poor
Csah 21 over Stream	Fillmore	3 — Serious	135	Fair
CR 112 over Watonwan River	Watonwan	3 — Serious	135	Good
Csah 33 over Elm Creek	Martin	2 — Critical	128	Poor
Csah 33 over Lily Creek	Martin	3 — Serious	128	Fair
Csah 3 over Mound Creek	Brown	3 — Serious	127	Fair
Csah 10 over Perch Creek	Blue Earth	3 — Serious	125	Poor
Csah 16 over Ditch	Fillmore	3 — Serious	120	Fair
M 45 over Hawk Creek	Chippewa	3 — Serious	119	Poor
CR 142 over Elm Creek	Martin	3 — Serious	115	Good
CR 3 over Hawk Creek	Chippewa	3 — Serious	113	Good
Csah 38 over Co Ditch # 3	Lac qui Parle	2 — Critical	105	Poor
Csah 7 over Split Rock Creek	Rock	3 — Serious	105	Fair
CR 125 over E Fk Des Moines River	Martin	2 — Critical	100	Poor
CR 107 over Cr.107 Over Elm Creek	Martin	3 — Serious	99	Poor
Csah 17 over Hawk Creek	Chippewa	3 — Serious	95	Fair
CR 74 over Buffalo Creek	McLeod	3 — Serious	95	Fair
Csah 16 over Jack Creek	Nobles	3 — Serious	95	Fair
T 507 over S Fk Groundhouse River	Kanabec	2 — Critical	90	Fair
T 215 over Stream	Goodhue	3 — Serious	86	Fair
Csah 9 over Chippewa River	Chippewa	3 — Serious	85	Fair
CR 107 over E Fk Des Moines River	Martin	2 — Critical	77	Poor
T 188 over Pine Creek	Dakota	3 — Serious	75	Fair
Csah 16 over Camp Creek	Fillmore	3 — Serious	75	Fair
Csah 16 over Stream	Fillmore	3 — Serious	75	Fair
T 354 over Spring Valley Creek	Fillmore	3 — Serious	72	Fair
T 205 over Sleepy Eye Creek	Brown	3 — Serious	71	Good
Csah 26 over Creek	Watonwan	3 — Serious	70	Fair
T 75 over Stream	Fillmore	3 — Serious	68	Poor
Csah 23 over Whalan Creek	Fillmore	3 — Serious	65	Fair
Csah 23 over Whalan Creek	Fillmore	3 — Serious	65	Fair
Csah 13 over S Br Yellow Medicine R	Lyon	2 — Critical	65	Fair
T 1097 over Skunk River	Morrison	3 — Serious	64	Fair
Csah 29 over Stream	Fillmore	3 — Serious	60	Fair
Csah 29 over Riceford Creek	Fillmore	3 — Serious	60	Fair
T 153 over Root River	Fillmore	3 — Serious	60	Fair
Csah 21 over W Fk Lac Qui Parle River	Lac qui Parle	3 — Serious	60	Fair
T 275 over S Fk Crow River	Meeker	3 — Serious	60	Fair
CR 127 over Clearwater River	Red Lake	3 — Serious	60	Good
M 12 over Clearwater River	Red Lake	2 — Critical	59	Fair
CR 115 over Stream	Fillmore	3 — Serious	55	Fair
T 247 over Skunk River	Morrison	3 — Serious	55	Fair
Csah 37 over Hawk Creek	Renville	3 — Serious	55	Good
T 312 over Pine Island Creek	Goodhue	3 — Serious	53	Fair
M 330 over W Swan River	St. Louis	3 — Serious	52	Fair
T 443 over S Br Root River	Fillmore	3 — Serious	51	Fair
CR 123 over E Fk Des Moines River	Martin	3 — Serious	50	Poor
Csah 20 over Clearwater River	Red Lake	3 — Serious	50	Fair
M 85 over Midway River	St. Louis	3 — Serious	50	Poor
M 125 over Maple Creek	Steele	3 — Serious	50	Fair
T 57 over Hawk Creek	Chippewa	3 — Serious	46	Good
T 160 over Chub Creek	Dakota	3 — Serious	45	Fair
T 176 over Stream	Lyon	3 — Serious	45	Fair