Structure 35261 · Marion County, IA

G-71 over Cedar Creek

Carries G-71 over Cedar Creek, 074181401.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT404 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

404 ft end to end, longest span 97 ft: about 6 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 multi-beam bridge.

Built199036 years old
Length403.9 ft123.1 m
Daily traffic920counted 2022
Last inspectedDecember 2023every 48 months

Location

StateIowa
CountyMarion
Location074181401
CarriesG-71
CrossesCedar Creek
Coordinates41.21908, -92.90882

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length403.9 ft (123.1 m)
Max Span97.1 ft (29.6 m)
Deck Width39.0 ft (11.9 m)
Deck Area1464.9 sq m
Main Spans5
Year Built1990

Traffic

Avg Daily Traffic920 (2022)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000035261

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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