Structure 353155 · Woodbury County, IA

FM over Rock Creek

Carries FM over Rock Creek, 088430603.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Superstructure4/9 · Poor
Substructuresets the rating3/9 · Serious
Channelnot part of overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
20 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 4/9Substructure 3/9 · sets the rating

20 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 deck arch.

Built1900126 years old
Length20.0 ft6.1 m
Daily traffic199counted 2022
Last inspectedJuly 2024every 24 months

Location

StateIowa
CountyWoodbury
Location088430603
CarriesFM
CrossesRock Creek
Coordinates42.47504, -95.89551

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length20.0 ft (6.1 m)
Max Span20.0 ft (6.1 m)
Deck Width40.0 ft (12.2 m)
Deck Area74.4 sq m
Main Spans1
Year Built1900

Traffic

Avg Daily Traffic199 (2022)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalUnknown
Structure Number000000000353155

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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