US Bridges

County Highway over Antelope Creek

FairPosted for load

Mercer County, North Dakota · 3 West 1 North of Hazen · Structure no. 000000029125180

Built
1948
77 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
2 main spans
Daily traffic
10
2018 count
Owner
County
County Highway Agency

About this bridge

County Highway over Antelope Creek is a steel stringer/multi-beam or girder carrying County Highway over Antelope Creek in Mercer County, North Dakota. It was built in 1948, so it is 77 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 5 by 2038. The structure is 46 ft (14 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCounty Highway
CrossesAntelope Creek
Location3 West 1 North of Hazen
RouteCounty Highway 0
CountyMercer County
StateNorth Dakota
Coordinates47.31152, -101.68015
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating11.4 US tons
Inventory rating8.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadUnknown
Structure length46 ft (14 m)
Longest span26 ft (7.9 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic5 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$102,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Antelope Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is County Highway over 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 2023.

How much traffic does County Highway over Antelope Creek carry?

About 10 vehicles per day (2018 count).

How long is County Highway over Antelope Creek?

The structure is 46 ft (14 m) long with a longest span of 26 ft (7.9 m) and a deck 22 ft wide.

Who owns County Highway over Antelope Creek?

It is owned by the County Highway Agency.