Structure 29140195 R · Grand Forks County, ND

Interstate 29 over Nd297/demers AVE Int-gf

Carries Interstate 29 over Nd297/demers AVE Int-gf, 1 South US 2.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT285 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

285 ft end to end, longest span 70 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 box-beam bridge.

Built1968rebuilt 2009
Length285.1 ft86.9 m
Daily traffic8,200counted 2019
Last inspectedApril 2023every 24 months

Location

StateNorth Dakota
CountyGrand Forks
Location1 South US 2
CarriesInterstate 29
CrossesNd297/demers AVE Int-gf
Coordinates47.91854, -97.09331

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length285.1 ft (86.9 m)
Max Span69.9 ft (21.3 m)
Deck Width49.9 ft (15.2 m)
Deck Area1320.9 sq m
Main Spans4
Year Built1968 (reconstructed 2009)

Traffic

Avg Daily Traffic8,200 (2019)
Truck Traffic15%
Lanes On Bridge2
Lanes Under Bridge3

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0029140195 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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