US Bridges

Nd Highway over Branch-Antelope Creek

Fair

Grant County, North Dakota · 6 East of Elgin · Structure no. 0021082286

Built
1952
73 years old, rebuilt 1997
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
700
2017 count
Owner
State
State Highway Agency

About this bridge

Nd Highway over Branch-Antelope Creek is a concrete culvert carrying Nd Highway over Branch-Antelope Creek in Grant County, North Dakota. It was built in 1952 and reconstructed in 1997, so it is 73 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 6 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 700 vehicles a day, roughly 11% of them trucks, projected to reach 680 by 2037. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 70.2 mi (113 km).

CarriesNd Highway
CrossesBranch-Antelope Creek
Location6 East of Elgin
RouteState Highway 21
Coordinates46.40084, -101.71274
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.6 US tons
Inventory rating24.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
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 traffic700 (2017)
Projected traffic680 by 2037
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nd Highway over Branch-Antelope Creek built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1997.

What condition is Nd Highway over Branch-Antelope Creek 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 July 2024.

How much traffic does Nd Highway over Branch-Antelope Creek carry?

About 700 vehicles per day (2017 count), of which roughly 11% are trucks.

How long is Nd Highway over Branch-Antelope Creek?

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

Who owns Nd Highway over Branch-Antelope Creek?

It is owned by the State Highway Agency.