Structure 12520282 · Charles Mix County, SD

29620 396th Avenue over Choteau Creek

Carries 29620 396th Avenue over Choteau Creek, 0.8n & 1.0e Of Wagner.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

34 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 multi-beam bridge.

Built193096 years old
Length34.1 ft10.4 m
Daily traffic48counted 2022
Last inspectedOctober 2023every 24 months

Location

StateSouth Dakota
CountyCharles Mix
Location0.8n & 1.0e Of Wagner
Carries29620 396th Avenue
CrossesChoteau Creek
Coordinates43.09270, -98.26824

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length34.1 ft (10.4 m)
Max Span33.1 ft (10.1 m)
Deck Width16.1 ft (4.9 m)
Deck Area51.0 sq m
Main Spans1
Year Built1930

Traffic

Avg Daily Traffic48 (2022)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000012520282

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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