US Bridges

County Highway over Bonnes Coulee

Fair

Ward County, North Dakota · 6 South Sawyer · Structure no. 000000051154551

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
25 ft
1 main span
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Bonnes Coulee is a concrete channel beam carrying County Highway over Bonnes Coulee in Ward County, North Dakota. It was built in 1960, so it is 65 years old, older than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, projected to reach 100 by 2039. The structure is 25 ft (7.6 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesBonnes Coulee
Location6 South Sawyer
RouteCounty Highway 5158
CountyWard County
StateNorth Dakota
Coordinates47.9933, -101.06178
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.7 US tons
Inventory rating32.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic100 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Bonnes Coulee built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Highway over Bonnes Coulee in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does County Highway over Bonnes Coulee carry?

About 100 vehicles per day (2019 count).

How long is County Highway over Bonnes Coulee?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns County Highway over Bonnes Coulee?

It is owned by the County Highway Agency.