Structure 52671 · Winneshiek County, IA

Ia 24 over Turkey River

Carries Ia 24 over Turkey River, 0.5 Mi. E Of Jct. SR B32.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT314 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

314 ft end to end, longest span 107 ft: about 4 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 multi-beam bridge.

Built200620 years old
Length314.0 ft95.7 m
Daily traffic2,860counted 2022
Last inspectedOctober 2024every 24 months

Location

StateIowa
CountyWinneshiek
Location0.5 Mi. E Of Jct. SR B32
CarriesIa 24
CrossesTurkey River
Coordinates43.14677, -91.93088

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length314.0 ft (95.7 m)
Max Span107.0 ft (32.6 m)
Deck Width47.2 ft (14.4 m)
Deck Area1378.1 sq m
Main Spans3
Year Built2006

Traffic

Avg Daily Traffic2,860 (2022)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000052671

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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