Structure 42011 · Polk County, IA

34th AVE NW over I-80 & Us-65

Carries 34th AVE NW over I-80 & Us-65, 0.4 Miles W Of Jct US 65.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT309 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 8/9

309 ft end to end, longest span 114 ft: about 4 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.

Built201313 years old
Length309.1 ft94.2 m
Daily traffic5,106counted 2023
Last inspectedDecember 2023every 24 months

Location

StateIowa
CountyPolk
Location0.4 Miles W Of Jct US 65
Carries34th AVE NW
CrossesI-80 & Us-65
Coordinates41.66173, -93.50309

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length309.1 ft (94.2 m)
Max Span113.5 ft (34.6 m)
Deck Width58.4 ft (17.8 m)
Deck Area1676.8 sq m
Main Spans4
Year Built2013

Traffic

Avg Daily Traffic5,106 (2023)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge9

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 Number000000000042011

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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