Scour-Critical Bridges in North Dakota

North Dakota has 108 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
Nd Highway 13 over Bois De Sioux River	Richland	3 — Serious	15,200	Fair
US Highway 281 SB over James River	Stutsman	3 — Serious	10,370	Fair
US Highway 281 over James River	Stutsman	2 — Critical	10,370	Fair
Nd Highway 22 over Heart River	Stark	3 — Serious	9,940	Fair
US Highway 52 over James River	Stutsman	3 — Serious	5,600	Fair
Nd Highway 18 over Goose River	Traill	3 — Serious	4,800	Fair
Interstate 94 over Apple Creek	Burleigh	3 — Serious	3,850	Fair
Interstate 94 over Apple Creek	Burleigh	3 — Serious	3,850	Fair
Lincoln Road over Apple Creek	Burleigh	3 — Serious	2,900	Fair
US Highway 2 over Sand Creek	Williams	3 — Serious	2,550	Fair
US Highway 83 over Creek	Emmons	3 — Serious	1,970	Good
State Hospital Rd. over James River	Stutsman	2 — Critical	1,825	Good
Nd Highway 8 over Flat Creek	Adams	3 — Serious	1,730	Fair
US Highway 83 over Spring Creek	Emmons	3 — Serious	1,690	Fair
US Highway 83 over Long Lake	Burleigh	3 — Serious	1,410	Good
US Highway 12 over Flat Creek	Adams	3 — Serious	1,370	Fair
Interstate 94 over Little Missouri R.	Billings	3 — Serious	1,300	Fair
Nd Highway 46 over Maple River	Ransom	3 — Serious	1,200	Good
Nd Highway 22 over Cannonball River	Hettinger	3 — Serious	830	Fair
Nd Highway 200 over Knife River	Mercer	3 — Serious	790	Fair
Nd Highway 32 over No. Branch Forest River	Walsh	3 — Serious	790	Good
I-94 Business Loop over Little Missouri River	Billings	3 — Serious	730	Fair
Nd Highway 8 over Cannonball River	Hettinger	3 — Serious	670	Good
County Highway over Turtle River	Grand Forks	2 — Critical	600	Good
Nd Highway 17 over Creek	Ramsey	2 — Critical	580	Fair
Nd Highway 17 over Mauvais Coulee	Towner	3 — Serious	560	Poor
County Highway over Red River Of The North	Richland	3 — Serious	500	Fair
Lee Avenue over Heart River	Stark	2 — Critical	485	Good
100m AVE SW over Antelope Creek	Stark	2 — Critical	485	Good
Lehigh Road over Heart River	Stark	3 — Serious	450	Fair
Nd Highway 14 over Stone Creek	Bottineau	3 — Serious	390	Fair
102 AVE SW over Cannonball River	Hettinger	2 — Critical	355	Good
County Road over Downing Creek	McHenry	3 — Serious	355	Fair
Nd Highway 1 over Sheyenne River	Nelson	3 — Serious	300	Poor
Nd Highway 36 over Pipestem Creek	Stutsman	3 — Serious	300	Fair
3rd AVE SW over Antelope Creek	Mercer	3 — Serious	270	Fair
Nd Highway 45 over Sheyenne River	Griggs	3 — Serious	250	Fair
Irrsr Nd Hiway 49 over Cedar Creek	Grant	3 — Serious	240	Fair
County Highway over Goose River	Grand Forks	2 — Critical	235	Good
County Highway over Turtle Creek	McLean	3 — Serious	220	Fair
County Road 0522 over Creek Bed	Bottineau	3 — Serious	215	Fair
County HWY over Big Coulee	Benson	0 — Bridge closed	200	Poor
Nd Highway 89 over Tongue River	Pembina	3 — Serious	170	Good
Nd Highway 53 over Wintering River	McHenry	3 — Serious	166	Fair
Approach To School over Creek	Barnes	3 — Serious	160	Fair
23rd St. NE over Cedar Creek	Adams	3 — Serious	140	Good
County Highway over Pipestem Creek	Stutsman	3 — Serious	140	Fair
Main Avenue over Little Knife River	Morton	3 — Serious	130	Fair
4th ST Northeast over Cedar Creek	Adams	3 — Serious	125	Fair
6th AVE SE over Beaver Creek Overflow	Emmons	3 — Serious	120	Fair
County Highway over Wintering River	McHenry	3 — Serious	120	Fair
County Highway over Little Beicegel Creek	McKenzie	2 — Critical	120	Good
71st ST SE over Beaver Creek	Logan	3 — Serious	115	Good
County Road over Egg Creek	Ward	3 — Serious	115	Fair
County Highway 86 over Drainage Area	Morton	3 — Serious	110	Poor
County Highway over Square Butte Creek	Oliver	3 — Serious	110	Fair
27th St. NE over Cedar Creek	Adams	3 — Serious	100	Good
93rd AVE SW over Timber Creek	Hettinger	3 — Serious	100	Fair
Cr139 over Big Muddy Creek	Morton	3 — Serious	100	Fair
County Road 136 over S Branch Little Heart Rv	Morton	3 — Serious	100	Fair
70th ST SW over Creek	Hettinger	3 — Serious	90	Good
74th AVE SW over Antelope Creek	Grant	3 — Serious	80	Fair
Heil Road over Creek	Grant	3 — Serious	80	Fair
60th Street over Creek	Morton	3 — Serious	80	Good
County Highway over Sheyenne River	Nelson	3 — Serious	80	Good
49th Street over Creek	Morton	3 — Serious	78	Fair
83rd AVE SW over Thirty Mile Creek	Hettinger	3 — Serious	70	Fair
57th Street SW over Beaver Creek	Hettinger	3 — Serious	65	Fair
Township Road over Sheyenne River	Barnes	3 — Serious	60	Fair
159th AVE SW over N. Branch Garner Creek	Golden Valley	3 — Serious	60	Fair
159th AVE SW over S. Branch Garner Creek	Golden Valley	3 — Serious	60	Fair
111th AVE SW over Coal Bank Creek	Hettinger	3 — Serious	60	Fair
County Road 135 over SE Branch Little Heart R	Morton	3 — Serious	60	Good
20th AVE SE over S Branch Beaver Creek	Emmons	3 — Serious	52	Fair
County Highway over Big Coulee	Ramsey	0 — Bridge closed	52	Good
Access Road over Intermittant Creek	Barnes	3 — Serious	50	Poor
58th ST SW over Coal Creek	Grant	3 — Serious	50	Fair
County Highway over Creek	Grand Forks	2 — Critical	45	Poor
46th Avenue over Heart River	Grant	3 — Serious	45	Fair
County Road over Little Deep Creek	Ward	3 — Serious	45	Fair
111th Avenue SW over Cannonball River	Hettinger	3 — Serious	40	Fair
98th AVE SW over Creek	Hettinger	3 — Serious	40	Good
County Highway over Long Creek	Divide	3 — Serious	35	Poor
141st Avenue over North Fork Grand River	Bowman	3 — Serious	30	Good
County Road over Creek	Dickey	3 — Serious	30	Fair
County Highway over Big Coulee	Benson	0 — Bridge closed	25	Good
County Highway over Big Coulee	Benson	0 — Bridge closed	25	Good
53rd AVE SW over Cannonball River	Grant	3 — Serious	25	Fair
State Park Road over Sheyenne River	Ransom	2 — Critical	25	Fair
County Highway over Big Coulee	Benson	0 — Bridge closed	20	Good
County Highway over Creek	Divide	3 — Serious	20	Fair
93rd ST SW over Timber Creek	Grant	3 — Serious	20	Fair
73rd AVE SW (cr2) over Creek	Mercer	3 — Serious	20	Fair
County Highway over Big Coulee	Ramsey	3 — Serious	20	Good
County Highway over Big Coulee	Ramsey	0 — Bridge closed	20	Good
County Highway over Coulee	Ramsey	3 — Serious	20	Fair
County Highway over Mauvais Coulee	Towner	0 — Bridge closed	20	Good
County Highway over North Branch Goose River	Traill	2 — Critical	20	Good
County Highway over Little Muddy River	Williams	2 — Critical	20	Poor
73rd AVE SE over Cottonwood Creek	LaMoure	2 — Critical	18	Good
County Highway over James River	Eddy	3 — Serious	15	Good
County Highway over Creek	Steele	3 — Serious	15	Good
County Highway over Branch Of Elm River	Cass	3 — Serious	10	Poor
Approach over Elm Coulee	Grand Forks	3 — Serious	10	Fair
55th Avenue SW over Antelope Creek	Mercer	3 — Serious	10	Fair
County Highway over Creek	Walsh	3 — Serious	10	Fair
County Highway over James River	Wells	3 — Serious	10	Good
145th ST NE over Apple Creek	Burleigh	3 — Serious	5	Fair