Structure 54440 · Wright County, IA

Ia 17 over Drainage Ditch

Carries Ia 17 over Drainage Ditch, 3.7 Mi. S Of Jct. Ia 3.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

43 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.

Built1933rebuilt 1989
Length43.0 ft13.1 m
Daily traffic3,100counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateIowa
CountyWright
Location3.7 Mi. S Of Jct. Ia 3
CarriesIa 17
CrossesDrainage Ditch
Coordinates42.67883, -93.90587

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length43.0 ft (13.1 m)
Max Span40.0 ft (12.2 m)
Deck Width47.6 ft (14.5 m)
Deck Area189.9 sq m
Main Spans1
Year Built1933 (reconstructed 1989)

Traffic

Avg Daily Traffic3,100 (2023)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number000000000054440

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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