US Bridges

Lehigh Road over Heart River

Fair

Stark County, North Dakota · 3 East 1 South Dickinson · Structure no. 000000045125100

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
450
2018 count
Owner
County
County Highway Agency

About this bridge

Lehigh Road over Heart River is a prestressed concrete box beam or girders - multiple carrying Lehigh Road over Heart River in Stark County, North Dakota. It was built in 1962, so it is 63 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.

It carries about 450 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2038. The structure is 155 ft (47.2 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLehigh Road
CrossesHeart River
Location3 East 1 South Dickinson
RouteCounty Highway 4512
CountyStark County
StateNorth Dakota
Coordinates46.87032, -102.70819
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.9 US tons
Inventory rating30.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadH 20
Structure length155 ft (47.2 m)
Longest span55 ft (16.8 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2018)
Projected traffic600 by 2038
Trucks10%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Lehigh Road over Heart River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Lehigh Road 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 2023.

How much traffic does Lehigh Road over Heart River carry?

About 450 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Lehigh Road over Heart River?

The structure is 155 ft (47.2 m) long with a longest span of 55 ft (16.8 m) and a deck 29 ft wide.

Who owns Lehigh Road over Heart River?

It is owned by the County Highway Agency.