US Bridges

State Avenue over Heart River

Fair

Stark County, North Dakota · Southwest Dickinson · Structure no. 0000DKSN12

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
166 ft
3 main spans
Daily traffic
2,850
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

State Avenue over Heart River is a prestressed concrete continuous box beam or girders - single or spread carrying State Avenue over Heart River in Stark County, North Dakota. It was built in 1986, so it is 39 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 2,850 vehicles a day, roughly 1% of them trucks, projected to reach 3,420 by 2039. The structure is 166 ft (50.6 m) long and 62 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesState Avenue
CrossesHeart River
LocationSouthwest Dickinson
RouteCity Street 8316
CountyStark County
StateNorth Dakota
Coordinates46.86974, -102.80933
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.1 US tons
Inventory rating18 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length166 ft (50.6 m)
Longest span66 ft (20.1 m)
Deck width62 ft (19 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,850 (2019)
Projected traffic3,420 by 2039
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Avenue over Heart River built?

It was built in 1986, making it 39 years old in 2025.

What condition is State Avenue 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 State Avenue over Heart River carry?

About 2,850 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is State Avenue over Heart River?

The structure is 166 ft (50.6 m) long with a longest span of 66 ft (20.1 m) and a deck 62 ft wide.

Who owns State Avenue over Heart River?

It is owned by the City or Municipal Highway Agency.