Structure A032 · Todd County, SD

IRR BIA RTE 5 over Little White River

Carries IRR BIA RTE 5 over Little White River, 17.6 Km NE Spring CR Sch.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
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 FT99 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 4/9

99 ft end to end, longest span 35 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 channel-beam bridge.

Built196561 years old
Length99.1 ft30.2 m
Daily traffic1,019counted 2024
Last inspectedAugust 2024every 24 months

Location

StateSouth Dakota
CountyTodd
Location17.6 Km NE Spring CR Sch
CarriesIRR BIA RTE 5
CrossesLittle White River
Coordinates43.24161, -100.95000

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length99.1 ft (30.2 m)
Max Span35.1 ft (10.7 m)
Deck Width32.2 ft (9.8 m)
Deck Area296.0 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic1,019 (2024)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number00000000000A032

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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