Structure 41233142 · Lawrence County, SD

Us014a over Bear Butte Ck

Carries Us014a over Bear Butte Ck, 2.9 W I 90 Interch.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
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 7/9Superstructure 7/9Substructure 7/9

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 rigid-frame bridge.

Built197551 years old
Length34.1 ft10.4 m
Daily traffic6,870counted 2024
Last inspectedJune 2024every 24 months

Location

StateSouth Dakota
CountyLawrence
Location2.9 W I 90 Interch
CarriesUs014a
CrossesBear Butte Ck
Coordinates44.39874, -103.58397

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length34.1 ft (10.4 m)
Max Span31.2 ft (9.5 m)
Deck Width38.7 ft (11.8 m)
Deck Area122.7 sq m
Main Spans1
Year Built1975

Traffic

Avg Daily Traffic6,870 (2024)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000041233142

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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