Structure 505130 · Woodbury County, IA

3rd ST over Perry Creek Conduit

Carries 3rd ST over Perry Creek Conduit, N Of Jct. I-29 & Us77.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT78 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

78 ft end to end. Lengths and the car 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
Length78.4 ft23.9 m
Daily traffic7,065counted 2022
Last inspectedApril 2021every 48 months

Location

StateIowa
CountyWoodbury
LocationN Of Jct. I-29 & Us77
Carries3rd ST
CrossesPerry Creek Conduit
Coordinates42.49315, -96.41119

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length78.4 ft (23.9 m)
Max Span75.1 ft (22.9 m)
Deck Width88.6 ft (27 m)
Deck Area645.3 sq m
Main Spans1
Year Built2013

Traffic

Avg Daily Traffic7,065 (2022)
Truck Traffic2%
Lanes On Bridge4

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical9 — Foundation above flood level
Structure Number000000000505130

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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