Structure 10130416 · Butte County, SD

Sd034 over False Bottom Ck

Carries Sd034 over False Bottom Ck, 0.5 NW Lawrence Co Line.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT141 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

141 ft end to end, longest span 36 ft. Lengths and the semi-truck 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 slab bridge.

Built199234 years old
Length141.4 ft43.1 m
Daily traffic3,547counted 2024
Last inspectedFebruary 2024every 24 months

Location

StateSouth Dakota
CountyButte
Location0.5 NW Lawrence Co Line
CarriesSd034
CrossesFalse Bottom Ck
Coordinates44.61072, -103.79103

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length141.4 ft (43.1 m)
Max Span36.4 ft (11.1 m)
Deck Width46.6 ft (14.2 m)
Deck Area612.0 sq m
Main Spans4
Year Built1992

Traffic

Avg Daily Traffic3,547 (2024)
Truck Traffic25%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000010130416

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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