Structure 357440 · Wright County, IA

240th ST over Drainage Ditch 14

Carries 240th ST over Drainage Ditch 14, 091241701.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

32 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.

Built1920rebuilt 1984
Length32.2 ft9.8 m
Daily traffic46counted 2022
Last inspectedMarch 2024every 24 months

Location

StateIowa
CountyWright
Location091241701
Carries240th ST
CrossesDrainage Ditch 14
Coordinates42.70218, -93.71219

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length32.2 ft (9.8 m)
Max Span32.2 ft (9.8 m)
Deck Width24.0 ft (7.3 m)
Deck Area71.5 sq m
Main Spans1
Year Built1920 (reconstructed 1984)

Traffic

Avg Daily Traffic46 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number000000000357440

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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