Structure 42921 · Polk County, IA

EB I-235 over University AVE

Carries EB I-235 over University AVE, 0.6 Mi E Of Jct US 69 NB.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,019 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

1,019 ft end to end, longest span 220 ft: about 2.8 football fields. 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.

Built200521 years old
Length1019.0 ft310.6 m
Daily traffic29,900counted 2022
Last inspectedNovember 2023every 24 months

Location

StateIowa
CountyPolk
Location0.6 Mi E Of Jct US 69 NB
CarriesEB I-235
CrossesUniversity AVE
Coordinates41.59982, -93.58699

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1019.0 ft (310.6 m)
Max Span220.1 ft (67.1 m)
Deck Width74.1 ft (22.6 m)
Deck Area7019.6 sq m
Main Spans5
Year Built2005

Traffic

Avg Daily Traffic29,900 (2022)
Truck Traffic8%
Lanes On Bridge4
Lanes Under Bridge5

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000042921

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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