420th over Big Cedar River

Fair Condition63 years old422 vehicles/day

Location

StateIowa
CountyMitchell
Location099182603
Carries420th
CrossesBig Cedar River
Coordinates43.37138, -92.93686

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length356.0 ft (108.5 m)
Max Span78.1 ft (23.8 m)
Deck Width30.2 ft (9.2 m)
Deck Area998.2 sq m
Main Spans5
Year Built1963

Traffic

Avg Daily Traffic422 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number000000000248710

Nearby Bridges

Echo AVE over Willow Creek 0.7 mi Good Old Ia 105 over Turtle Creek 0.9 mi Fair Old Ia 105 over Cedar River 1.2 mi Good Foothill AVE over Big Cedar River 1.3 mi Good US 218 over Turtle Creek 1.6 mi Good Dancer AVE over Deer Creek 2.1 mi Good Cameo AVE over Willow Creek 2.4 mi Good 440th over Deer Creek 2.7 mi Poor 440th over Turtle Creek 2.8 mi Good T28 Hickory AVE over Turtle Creek 3.3 mi Good