Structure 85181526 · McKenzie County, ND

US Highway 85 over Missouri River-bnrr

Carries US Highway 85 over Missouri River-bnrr, 2 South Of US 2.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,522 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,522 ft end to end, longest span 270 ft: about 4.2 football fields. Lengths and the semi-truck 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.

Built20179 years old
Length1522.3 ft464 m
Daily traffic6,677counted 2022
Last inspectedAugust 2023every 24 months

Location

StateNorth Dakota
CountyMcKenzie
Location2 South Of US 2
CarriesUS Highway 85
CrossesMissouri River-bnrr
Coordinates48.10889, -103.71730

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1522.3 ft (464 m)
Max Span270.0 ft (82.3 m)
Deck Width84.6 ft (25.8 m)
Deck Area11971.2 sq m
Main Spans6
Year Built2017

Traffic

Avg Daily Traffic6,677 (2022)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0085181526

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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