Structure 10146229 · Butte County, SD

Us085 over Indian Ck

Carries Us085 over Indian Ck, 16 NE Jct US 212.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT140 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

140 ft end to end, longest span 28 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.

Built196561 years old
Length140.1 ft42.7 m
Daily traffic1,037counted 2024
Last inspectedMarch 2024every 24 months

Location

StateSouth Dakota
CountyButte
Location16 NE Jct US 212
CarriesUs085
CrossesIndian Ck
Coordinates44.88131, -103.75968

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length140.1 ft (42.7 m)
Max Span28.2 ft (8.6 m)
Deck Width34.4 ft (10.5 m)
Deck Area448.4 sq m
Main Spans5
Year Built1965

Traffic

Avg Daily Traffic1,037 (2024)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number000000010146229

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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