US Bridges

6th Ave SE over Heart River

Good

Stark County, North Dakota · 9th Ave Se-Dickinson · Structure no. 0000DKSN13

Built
1996
29 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
200 ft
3 main spans
Daily traffic
400
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

6th Ave SE over Heart River is a prestressed concrete continuous box beam or girders - single or spread carrying 6th Ave SE over Heart River in Stark County, North Dakota. It was built in 1996, so it is 29 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, roughly 5% of them trucks, projected to reach 450 by 2039. The structure is 200 ft (61 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries6th Ave SE
CrossesHeart River
Location9th Ave Se-Dickinson
RouteCity Street 8358
Coordinates46.87584, -102.77837
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating16.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length200 ft (61 m)
Longest span74 ft (22.6 m)
Deck width48 ft (14.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2019)
Projected traffic450 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 6th Ave SE over Heart River built?

It was built in 1996, making it 29 years old in 2025.

What condition is 6th Ave SE over Heart River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does 6th Ave SE over Heart River carry?

About 400 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is 6th Ave SE over Heart River?

The structure is 200 ft (61 m) long with a longest span of 74 ft (22.6 m) and a deck 48 ft wide.

Who owns 6th Ave SE over Heart River?

It is owned by the City or Municipal Highway Agency.