Structure 94470 · Carroll County, IA

Local over Middle Raccoon River

Carries Local over Middle Raccoon River, 083343503.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT82 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

82 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 through truss.

Built1914112 years old
Length82.0 ft25 m
Daily traffic15counted 2022
Last inspectedMay 2022every 24 months

Location

StateIowa
CountyCarroll
Location083343503
CarriesLocal
CrossesMiddle Raccoon River
Coordinates41.96075, -94.77869

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length82.0 ft (25 m)
Max Span80.1 ft (24.4 m)
Deck Width16.1 ft (4.9 m)
Deck Area122.5 sq m
Main Spans1
Year Built1914

Traffic

Avg Daily Traffic15 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionMay 2022
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number000000000094470

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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