Structure 53125080 · Williams County, ND

County Highway over Little Muddy River

Carries County Highway over Little Muddy River, 2 West 3 South Alamo.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating2/9 · Critical
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 2/9 · sets the ratingSubstructure 5/9

41 ft end to end. 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 through truss.

Built1920106 years old
Length41.0 ft12.5 m
Daily traffic24counted 2020
Last inspectedNovember 2024

Location

StateNorth Dakota
CountyWilliams
Location2 West 3 South Alamo
CarriesCounty Highway
CrossesLittle Muddy River
Coordinates48.52582, -103.51582

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length41.0 ft (12.5 m)
Max Span39.0 ft (11.9 m)
Deck Width16.4 ft (5 m)
Deck Area62.5 sq m
Main Spans1
Year Built1920

Traffic

Avg Daily Traffic24 (2020)
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
OwnerCounty Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour CriticalUnknown
Structure Number000000053125080

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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