US Bridges

76th Street SW over Deep Creek

Good

Slope County, North Dakota · 8 N 2.5 W of Bowman · Structure no. 000000044129220

Built
1987
38 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

76th Street SW over Deep Creek is a prestressed concrete tee beam carrying 76th Street SW over Deep Creek in Slope County, North Dakota. It was built in 1987, so it is 38 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 25 by 2038. The structure is 50 ft (15.2 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries76th Street SW
CrossesDeep Creek
Location8 N 2.5 W of Bowman
RouteCounty Highway 4424
Coordinates46.30894, -103.45462
Functional classRural Major Collector

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.8 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic25 by 2038
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 76th Street SW over Deep Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is 76th Street SW over Deep Creek 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 2023.

How much traffic does 76th Street SW over Deep Creek carry?

About 50 vehicles per day (2018 count).

How long is 76th Street SW over Deep Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 29 ft wide.

Who owns 76th Street SW over Deep Creek?

It is owned by the County Highway Agency.