Structure 20116260 · Griggs County, ND

County Highway over Bn Railroad

Carries County Highway over Bn Railroad, 2 East 1 South Hannaford.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT170 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

170 ft end to end, longest span 21 ft: about 2 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.

Built1924102 years old
Length169.9 ft51.8 m
Daily traffic24counted 2017
Last inspectedNovember 2024every 24 months

Location

StateNorth Dakota
CountyGriggs
Location2 East 1 South Hannaford
CarriesCounty Highway
CrossesBn Railroad
Coordinates47.30337, -98.15181

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length169.9 ft (51.8 m)
Max Span21.0 ft (6.4 m)
Deck Width22.0 ft (6.7 m)
Deck Area347.1 sq m
Main Spans9
Year Built1924

Traffic

Avg Daily Traffic24 (2017)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerRailroad
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number000000020116260

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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