Structure 44840 · Pottawattamie County, IA

I 29 SB over 25th ST

Carries I 29 SB over 25th ST, 1.0 Mi. S Of Ia 192.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT158 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

158 ft end to end, longest span 77 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.

Built196759 years old
Length158.1 ft48.2 m
Daily traffic5,400counted 2022
Last inspectedJune 2023every 24 months

Location

StateIowa
CountyPottawattamie
Location1.0 Mi. S Of Ia 192
CarriesI 29 SB
Crosses25th ST
Coordinates41.27507, -95.88147

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length158.1 ft (48.2 m)
Max Span77.1 ft (23.5 m)
Deck Width42.3 ft (12.9 m)
Deck Area621.8 sq m
Main Spans3
Year Built1967

Traffic

Avg Daily Traffic5,400 (2022)
Truck Traffic25%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000044840

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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