Structure 29168629 L · Walsh County, ND

Interstate 29 over Forest River

Carries Interstate 29 over Forest River, 7 South Nd 17.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT210 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

210 ft end to end, longest span 81 ft: about 3 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.

Built1971rebuilt 1997
Length210.0 ft64 m
Daily traffic2,300counted 2019
Last inspectedJune 2023every 24 months

Location

StateNorth Dakota
CountyWalsh
Location7 South Nd 17
CarriesInterstate 29
CrossesForest River
Coordinates48.30846, -97.18962

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length210.0 ft (64 m)
Max Span81.0 ft (24.7 m)
Deck Width41.7 ft (12.7 m)
Deck Area812.8 sq m
Main Spans3
Year Built1971 (reconstructed 1997)

Traffic

Avg Daily Traffic2,300 (2019)
Truck Traffic30%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number0029168629 L

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.

Nearby Bridges