Structure 297001276 · Grand Forks County, ND

Columbia Road over Demers AVE & Bnrr

Carries Columbia Road over Demers AVE & Bnrr, Demers Ave-bnrr-g. Forks.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,420 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

1,420 ft end to end, longest span 168 ft: about 3.9 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.

Built1984rebuilt 1989
Length1419.9 ft432.8 m
Daily traffic19,000counted 2019
Last inspectedMay 2023every 24 months

Location

StateNorth Dakota
CountyGrand Forks
LocationDemers Ave-bnrr-g. Forks
CarriesColumbia Road
CrossesDemers AVE & Bnrr
Coordinates47.91822, -97.06631

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length1419.9 ft (432.8 m)
Max Span168.0 ft (51.2 m)
Deck Width65.3 ft (19.9 m)
Deck Area8612.7 sq m
Main Spans10
Year Built1984 (reconstructed 1989)

Traffic

Avg Daily Traffic19,000 (2019)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0297001276

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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