Structure 17367246 · Custer County, SD

Sd079s over Beaver Ck

Carries Sd079s over Beaver Ck, 2.7 N Fall River Co Line.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT186 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

186 ft end to end, longest span 37 ft: about 3 semi-trucks nose to tail. 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.

Built200422 years old
Length186.0 ft56.7 m
Daily traffic2,289counted 2024
Last inspectedApril 2021every 48 months

Location

StateSouth Dakota
CountyCuster
Location2.7 N Fall River Co Line
CarriesSd079s
CrossesBeaver Ck
Coordinates43.51254, -103.32752

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length186.0 ft (56.7 m)
Max Span37.1 ft (11.3 m)
Deck Width38.7 ft (11.8 m)
Deck Area669.1 sq m
Main Spans5
Year Built2004

Traffic

Avg Daily Traffic2,289 (2024)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000017367246

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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