Structure 607210 · Dallas County, IA

WB Ia 141 over US 169

Carries WB Ia 141 over US 169, At Junction Of US 169.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT176 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

176 ft end to end, longest span 92 ft: about 2 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.

Built197848 years old
Length175.9 ft53.6 m
Daily traffic3,700counted 2022
Last inspectedJuly 2023every 24 months

Location

StateIowa
CountyDallas
LocationAt Junction Of US 169
CarriesWB Ia 141
CrossesUS 169
Coordinates41.83626, -94.02801

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length175.9 ft (53.6 m)
Max Span91.9 ft (28 m)
Deck Width43.3 ft (13.2 m)
Deck Area707.5 sq m
Main Spans3
Year Built1978

Traffic

Avg Daily Traffic3,700 (2022)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000607210

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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