Structure 608785 · Wapello County, IA

73rd ST over US 34

Carries 73rd ST over US 34, 2.1 Mi. E Of E Jct. US 63.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT396 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

396 ft end to end, longest span 126 ft: about 5 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
Length396.0 ft120.7 m
Daily traffic1,370counted 2022
Last inspectedNovember 2023every 24 months

Location

StateIowa
CountyWapello
Location2.1 Mi. E Of E Jct. US 63
Carries73rd ST
CrossesUS 34
Coordinates40.99979, -92.34333

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length396.0 ft (120.7 m)
Max Span126.0 ft (38.4 m)
Deck Width42.7 ft (13 m)
Deck Area1569.1 sq m
Main Spans4
Year Built2006

Traffic

Avg Daily Traffic1,370 (2022)
Truck Traffic10%
Lanes On Bridge2
Lanes Under Bridge4

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 Number000000000608785

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.

Nearby Bridges