US Bridges

71st Ave SW over Antelope Creek

Good

Grant County, North Dakota · 6 North 3 West of Elgin · Structure no. 000000019109160

Built
2011
14 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
35 ft
3 main spans
Daily traffic
25
2017 count
Owner
County
County Highway Agency

About this bridge

71st Ave SW over Antelope Creek is a concrete culvert carrying 71st Ave SW over Antelope Creek in Grant County, North Dakota. It was built in 2011, so it is 14 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, projected to reach 25 by 2037. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Carries71st Ave SW
CrossesAntelope Creek
Location6 North 3 West of Elgin
RouteCounty Highway 0
Coordinates46.49114, -101.90252
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating57.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length35 ft (10.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2017)
Projected traffic25 by 2037
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$24,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 71st Ave SW over Antelope Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is 71st Ave SW over Antelope 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 June 2024.

How much traffic does 71st Ave SW over Antelope Creek carry?

About 25 vehicles per day (2017 count).

How long is 71st Ave SW over Antelope Creek?

The structure is 35 ft (10.7 m) long with a longest span of 11 ft (3.4 m).

Who owns 71st Ave SW over Antelope Creek?

It is owned by the County Highway Agency.