Structure 602390 · Franklin County, IA

SB I-35 over 130th ST

Carries SB I-35 over 130th ST, 2.3 Mi. S Of Jct. Ia 3.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT155 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

155 ft end to end, longest span 57 ft: 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.

Built197353 years old
Length154.9 ft47.2 m
Daily traffic8,250counted 2022
Last inspectedNovember 2024every 24 months

Location

StateIowa
CountyFranklin
Location2.3 Mi. S Of Jct. Ia 3
CarriesSB I-35
Crosses130th ST
Coordinates42.71732, -93.42458

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length154.9 ft (47.2 m)
Max Span57.1 ft (17.4 m)
Deck Width43.3 ft (13.2 m)
Deck Area623.0 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic8,250 (2022)
Truck Traffic30%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000602390

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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