US Bridges

150th Ave SW over North Fork Grand River

Good

Bowman County, North Dakota · 4 West 13 South Bowman · Structure no. 000000006127200

Built
1984
41 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
50
2019 count
Owner
County
County Highway Agency

About this bridge

150th Ave SW over North Fork Grand River is a prestressed concrete tee beam carrying 150th Ave SW over North Fork Grand River in Bowman County, North Dakota. It was built in 1984, so it is 41 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 50 vehicles a day, projected to reach 50 by 2039. The structure is 51 ft (15.4 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries150th Ave SW
CrossesNorth Fork Grand River
Location4 West 13 South Bowman
RouteCounty Highway 0
Coordinates45.99145, -103.49403
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.7 US tons
Inventory rating44.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length51 ft (15.4 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic50 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 150th Ave SW over North Fork Grand River built?

It was built in 1984, making it 41 years old in 2025.

What condition is 150th Ave SW over North Fork Grand River 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 October 2023.

How much traffic does 150th Ave SW over North Fork Grand River carry?

About 50 vehicles per day (2019 count).

How long is 150th Ave SW over North Fork Grand River?

The structure is 51 ft (15.4 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns 150th Ave SW over North Fork Grand River?

It is owned by the County Highway Agency.