Structure 204191 · Johnson County, IA

SW Blk Diamond over Old Womans Creek

Carries SW Blk Diamond over Old Womans Creek, 079072705.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
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 FT61 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

61 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.

Built200620 years old
Length61.0 ft18.6 m
Daily traffic650counted 2021
Last inspectedMay 2023every 24 months

Location

StateIowa
CountyJohnson
Location079072705
CarriesSW Blk Diamond
CrossesOld Womans Creek
Coordinates41.61853, -91.65364

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length61.0 ft (18.6 m)
Max Span61.0 ft (18.6 m)
Deck Width30.5 ft (9.3 m)
Deck Area173.0 sq m
Main Spans1
Year Built2006

Traffic

Avg Daily Traffic650 (2021)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000204191

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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