US Bridges

County Highway over Big Coulee

Good

Towner County, North Dakota · 1 East 2 North Bisbee · Structure no. 000000048108240

Built
2012
13 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
20
2017 count
Owner
County
County Highway Agency

About this bridge

County Highway over Big Coulee is a concrete culvert carrying County Highway over Big Coulee in Towner County, North Dakota. It was built in 2012, so it is 13 years old, younger than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 20 by 2037. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesBig Coulee
Location1 East 2 North Bisbee
RouteCounty Highway 0
CountyTowner County
StateNorth Dakota
Coordinates48.66053, -99.35827
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.2 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2017)
Projected traffic20 by 2037
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$212,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Big Coulee built?

It was built in 2012, making it 13 years old in 2025.

What condition is County Highway over Big Coulee in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does County Highway over Big Coulee carry?

About 20 vehicles per day (2017 count).

How long is County Highway over Big Coulee?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns County Highway over Big Coulee?

It is owned by the County Highway Agency.