Structure 608570 · Polk County, IA

I-235 WB over Easton BLVD

Carries I-235 WB over Easton BLVD, 0.4 Mi. E Of Jct. Ia #163.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT175 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 8/9

175 ft end to end: 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.

Built200620 years old
Length174.9 ft53.3 m
Daily traffic36,300counted 2022
Last inspectedDecember 2023every 24 months

Location

StateIowa
CountyPolk
Location0.4 Mi. E Of Jct. Ia #163
CarriesI-235 WB
CrossesEaston BLVD
Coordinates41.60434, -93.57986

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length174.9 ft (53.3 m)
Max Span174.9 ft (53.3 m)
Deck Width62.7 ft (19.1 m)
Deck Area1018.0 sq m
Main Spans1
Year Built2006

Traffic

Avg Daily Traffic36,300 (2022)
Truck Traffic8%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000608570

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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