Structure 49190226 · Miner County, SD

437 AVE over West Fork Vermillion Rv

Carries 437 AVE over West Fork Vermillion Rv, 3e & 9.6s Howard.

Overall conditionPoor

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT26 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

26 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 channel-beam bridge.

Built196165 years old
Length25.9 ft7.9 m
Daily traffic25counted 2022
Last inspectedAugust 2024every 24 months

Location

StateSouth Dakota
CountyMiner
Location3e & 9.6s Howard
Carries437 AVE
CrossesWest Fork Vermillion Rv
Coordinates43.86903, -97.46987

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length25.9 ft (7.9 m)
Max Span23.0 ft (7 m)
Deck Width25.6 ft (7.8 m)
Deck Area61.6 sq m
Main Spans1
Year Built1961

Traffic

Avg Daily Traffic25 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000049190226

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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