US Bridges

58th Ave SW over Freedom Mine Road

Fair

Mercer County, North Dakota · 8 North of Beulah · Structure no. 000000029120120

Built
1991
34 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
232 ft
3 main spans
Daily traffic
600
2018 count
Owner
County
County Highway Agency

About this bridge

58th Ave SW over Freedom Mine Road is a prestressed concrete stringer/multi-beam or girder carrying 58th Ave SW over Freedom Mine Road in Mercer County, North Dakota. It was built in 1991, so it is 34 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 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 600 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2038. The structure is 232 ft (70.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries58th Ave SW
CrossesFreedom Mine Road
Location8 North of Beulah
RouteCounty Highway 2921
CountyMercer County
StateNorth Dakota
Coordinates47.38875, -101.78018
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length232 ft (70.7 m)
Longest span106 ft (32.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2018)
Projected traffic600 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 58th Ave SW over Freedom Mine Road built?

It was built in 1991, making it 34 years old in 2025.

What condition is 58th Ave SW over Freedom Mine Road 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 58th Ave SW over Freedom Mine Road carry?

About 600 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is 58th Ave SW over Freedom Mine Road?

The structure is 232 ft (70.7 m) long with a longest span of 106 ft (32.3 m) and a deck 31 ft wide.

Who owns 58th Ave SW over Freedom Mine Road?

It is owned by the County Highway Agency.