Structure 19119200 · Grant County, ND

61st AVE SW over Antelope Creek

Carries 61st AVE SW over Antelope Creek, 5 West 1 North Of Carson.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 6/9 · sets the rating

100 ft end to end, longest span 31 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.

Built197551 years old
Length100.1 ft30.5 m
Daily traffic100counted 2018
Last inspectedJune 2024every 24 months

Location

StateNorth Dakota
CountyGrant
Location5 West 1 North Of Carson
Carries61st AVE SW
CrossesAntelope Creek
Coordinates46.44268, -101.69554

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length100.1 ft (30.5 m)
Max Span30.8 ft (9.4 m)
Deck Width33.1 ft (10.1 m)
Deck Area308.1 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic100 (2018)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number000000019119200

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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