Structure 62310423 · Tripp County, SD

327 Avenue over Ck

Carries 327 Avenue over Ck, 4e 6.5s Colome.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

27 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 multi-beam bridge.

Built195274 years old
Length26.9 ft8.2 m
Daily traffic31counted 2022
Last inspectedJune 2023every 24 months

Location

StateSouth Dakota
CountyTripp
Location4e 6.5s Colome
Carries327 Avenue
CrossesCk
Coordinates43.16324, -99.63283

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length26.9 ft (8.2 m)
Max Span24.9 ft (7.6 m)
Deck Width22.0 ft (6.7 m)
Deck Area54.9 sq m
Main Spans1
Year Built1952

Traffic

Avg Daily Traffic31 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000062310423

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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