Structure 28400419 · Haakon County, SD

Dusty Ridge Road over Mitchell Ck

Carries Dusty Ridge Road over Mitchell Ck, 2 W & 5.1 N Midland.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT128 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

128 ft end to end, longest span 26 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.

Built196066 years old
Length128.0 ft39 m
Daily traffic39counted 2022
Last inspectedSeptember 2024every 24 months

Location

StateSouth Dakota
CountyHaakon
Location2 W & 5.1 N Midland
CarriesDusty Ridge Road
CrossesMitchell Ck
Coordinates44.14081, -101.20644

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length128.0 ft (39 m)
Max Span25.9 ft (7.9 m)
Deck Width30.8 ft (9.4 m)
Deck Area366.6 sq m
Main Spans5
Year Built1960

Traffic

Avg Daily Traffic39 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000028400419

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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