Structure 94920914 · Burleigh County, ND

I-94 Business Loop over Missouri River

Carries I-94 Business Loop over Missouri River, Between Bismarck & Mandan.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,369 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

2,369 ft end to end, longest span 285 ft: about 6.6 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 box-beam bridge.

Built200818 years old
Length2369.1 ft722.1 m
Daily traffic14,700counted 2019
Last inspectedAugust 2024every 24 months

Location

StateNorth Dakota
CountyBurleigh
LocationBetween Bismarck & Mandan
CarriesI-94 Business Loop
CrossesMissouri River
Coordinates46.80794, -100.81909

Physical Characteristics

MaterialSteel
DesignBox Beam - Single/Spread
Total Length2369.1 ft (722.1 m)
Max Span285.1 ft (86.9 m)
Deck Width84.6 ft (25.8 m)
Deck Area18630.2 sq m
Main Spans6
Year Built2008

Traffic

Avg Daily Traffic14,700 (2019)
Truck Traffic4%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0094920914

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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