US Bridges

54th Ave SW over Heart River

FairPosted for load

Grant County, North Dakota · 9 North of Carson · Structure no. 000000019126110

Built
1944
81 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
202 ft
3 main spans
Daily traffic
110
2018 count
Owner
County
County Highway Agency

About this bridge

54th Ave SW over Heart River is a steel continuous stringer/multi-beam or girder carrying 54th Ave SW over Heart River in Grant County, North Dakota. It was built in 1944, so it is 81 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 110 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2038. The structure is 202 ft (61.6 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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Carries54th Ave SW
CrossesHeart River
Location9 North of Carson
RouteCounty Highway 1927
CountyGrant County
StateNorth Dakota
Coordinates46.55919, -101.55588
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating10 US tons
Inventory rating6.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length202 ft (61.6 m)
Longest span97 ft (29.6 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2018)
Projected traffic80 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$527,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 54th Ave SW over Heart River built?

It was built in 1944, making it 81 years old in 2025.

What condition is 54th Ave SW over Heart River 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 June 2024.

How much traffic does 54th Ave SW over Heart River carry?

About 110 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is 54th Ave SW over Heart River?

The structure is 202 ft (61.6 m) long with a longest span of 97 ft (29.6 m) and a deck 22 ft wide.

Who owns 54th Ave SW over Heart River?

It is owned by the County Highway Agency.