Structure 700310 · Woodbury County, IA

I 29 NB over Floyd BLVD

Carries I 29 NB over Floyd BLVD, 3.0 Mi. N Of Jct. U.s. 75.

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 FT227 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

227 ft end to end, longest span 107 ft: about 3 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.

Built20188 years old
Length227.0 ft69.2 m
Daily traffic15,400counted 2022
Last inspectedDecember 2024every 24 months

Location

StateIowa
CountyWoodbury
Location3.0 Mi. N Of Jct. U.s. 75
CarriesI 29 NB
CrossesFloyd BLVD
Coordinates42.48674, -96.39482

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length227.0 ft (69.2 m)
Max Span107.0 ft (32.6 m)
Deck Width64.6 ft (19.7 m)
Deck Area1363.2 sq m
Main Spans3
Year Built2018

Traffic

Avg Daily Traffic15,400 (2022)
Truck Traffic19%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000700310

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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