Structure 608865 · Sioux County, IA

Ia 60 NB over Iowa 10

Carries Ia 60 NB over Iowa 10, Over Iowa 10.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT228 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

228 ft end to end, longest span 102 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 multi-beam bridge.

Built200224 years old
Length228.0 ft69.5 m
Daily traffic2,060counted 2022
Last inspectedJanuary 2024every 24 months

Location

StateIowa
CountySioux
LocationOver Iowa 10
CarriesIa 60 NB
CrossesIowa 10
Coordinates42.98367, -95.99661

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length228.0 ft (69.5 m)
Max Span102.0 ft (31.1 m)
Deck Width42.3 ft (12.9 m)
Deck Area896.5 sq m
Main Spans3
Year Built2002

Traffic

Avg Daily Traffic2,060 (2022)
Truck Traffic33%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000608865

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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