Structure 9137170 · Cass County, ND

County Highway over County Drain 12

Carries County Highway over County Drain 12, 2 West 1 North Of Harwood.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

111 ft end to end, longest span 54 ft. Lengths and the car 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.

Built196165 years old
Length110.9 ft33.8 m
Daily traffic20counted 2019
Last inspectedSeptember 2023every 24 months

Location

StateNorth Dakota
CountyCass
Location2 West 1 North Of Harwood
CarriesCounty Highway
CrossesCounty Drain 12
Coordinates46.99569, -96.92201

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length110.9 ft (33.8 m)
Max Span54.1 ft (16.5 m)
Deck Width28.2 ft (8.6 m)
Deck Area290.7 sq m
Main Spans2
Year Built1961

Traffic

Avg Daily Traffic20 (2019)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000009137170

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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