Structure 206940 · Jones County, IA

220th Ave. over White Oak Creek

Carries 220th Ave. over White Oak Creek, 083043402.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
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 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

31 ft end to end, longest span 15 ft. 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.

Built1947rebuilt 2017
Length30.8 ft9.4 m
Daily traffic11counted 2022
Last inspectedApril 2023every 24 months

Location

StateIowa
CountyJones
Location083043402
Carries220th Ave.
CrossesWhite Oak Creek
Coordinates41.95881, -91.30771

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length30.8 ft (9.4 m)
Max Span15.1 ft (4.6 m)
Deck Width24.0 ft (7.3 m)
Deck Area68.6 sq m
Main Spans2
Year Built1947 (reconstructed 2017)

Traffic

Avg Daily Traffic11 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000206940

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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