Structure 1820 · Floyd County, IA

Main ST over Cedar River

Carries Main ST over Cedar River, 095161205.

Overall conditionPoor

Set by its lowest-rated component: Superstructure and Substructure at 4 of 9.

How ratings work
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT248 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 4/9Substructure 4/9

248 ft end to end, longest span 80 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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 deck arch.

Built1909117 years old
Length248.0 ft75.6 m
Daily traffic4,971counted 2022
Last inspectedDecember 2024every 24 months

Location

StateIowa
CountyFloyd
Location095161205
CarriesMain ST
CrossesCedar River
Coordinates43.06580, -92.68023

Physical Characteristics

MaterialConcrete Continuous
DesignArch - Deck
Total Length248.0 ft (75.6 m)
Max Span80.1 ft (24.4 m)
Deck Width71.9 ft (21.9 m)
Deck Area1655.6 sq m
Main Spans3
Year Built1909

Traffic

Avg Daily Traffic4,971 (2022)
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical8 — Stable, low risk
Structure Number000000000001820

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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