Structure 58212100 · Spink County, SD

158th Sreet over Creek

Carries 158th Sreet over Creek, 4s & 1.8e Brentford.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 3/9 · sets the rating

41 ft end to end, longest span 13 ft. 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 slab bridge.

Built1955rebuilt 1970
Length41.0 ft12.5 m
Daily traffic30counted 2022
Last inspectedJune 2023every 12 months

Location

StateSouth Dakota
CountySpink
Location4s & 1.8e Brentford
Carries158th Sreet
CrossesCreek
Coordinates45.09787, -98.28347

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length41.0 ft (12.5 m)
Max Span13.1 ft (4 m)
Deck Width31.8 ft (9.7 m)
Deck Area121.2 sq m
Main Spans3
Year Built1955 (reconstructed 1970)

Traffic

Avg Daily Traffic30 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000058212100

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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