Structure 29053832 R · Cass County, ND

Interstate 29 over Wild Rice River

Carries Interstate 29 over Wild Rice River, 6 North Of Nd 46.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT274 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 5/9 · sets the rating

274 ft end to end, longest span 92 ft: about 4 semi-trucks nose to tail. 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.

Built1972rebuilt 2020
Length274.3 ft83.6 m
Daily traffic3,800counted 2019
Last inspectedMay 2023every 24 months

Location

StateNorth Dakota
CountyCass
Location6 North Of Nd 46
CarriesInterstate 29
CrossesWild Rice River
Coordinates46.71205, -96.83026

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length274.3 ft (83.6 m)
Max Span91.9 ft (28 m)
Deck Width43.3 ft (13.2 m)
Deck Area1103.5 sq m
Main Spans3
Year Built1972 (reconstructed 2020)

Traffic

Avg Daily Traffic3,800 (2019)
Truck Traffic18%
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 Number0029053832 R

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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