Structure 85074918 · Stark County, ND

US Highway 85 over Heart River

Carries US Highway 85 over Heart River, 1 South Of Jct. I-94.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT105 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

105 ft end to end, longest span 45 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1967rebuilt 1987
Length105.0 ft32 m
Daily traffic2,300counted 2019
Last inspectedMay 2023every 24 months

Location

StateNorth Dakota
CountyStark
Location1 South Of Jct. I-94
CarriesUS Highway 85
CrossesHeart River
Coordinates46.88460, -103.18970

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length105.0 ft (32 m)
Max Span44.9 ft (13.7 m)
Deck Width38.4 ft (11.7 m)
Deck Area374.4 sq m
Main Spans3
Year Built1967 (reconstructed 1987)

Traffic

Avg Daily Traffic2,300 (2019)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0085074918

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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