US Bridges

CO HWY 4 over Buffalo Coulee

Good

Traill County, North Dakota · 6 East 1 North Buxton · Structure no. 000000049124042

Built
2023
2 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

CO HWY 4 over Buffalo Coulee is a prestressed concrete box beam or girders - single or spread carrying CO HWY 4 over Buffalo Coulee in Traill County, North Dakota. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, projected to reach 40 by 2041. The structure is 70 ft (21.3 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCO HWY 4
CrossesBuffalo Coulee
Location6 East 1 North Buxton
RouteCounty Highway 0
CountyTraill County
StateNorth Dakota
Coordinates47.61866, -96.96246
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating42.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2021)
Projected traffic40 by 2041
Trucks0%
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 CO HWY 4 over Buffalo Coulee built?

It was built in 2023, making it 2 years old in 2025.

What condition is CO HWY 4 over Buffalo 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 September 2023.

How much traffic does CO HWY 4 over Buffalo Coulee carry?

About 30 vehicles per day (2021 count).

How long is CO HWY 4 over Buffalo Coulee?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 30 ft wide.

Who owns CO HWY 4 over Buffalo Coulee?

It is owned by the County Highway Agency.