Structure 52101 · Webster County, IA

Kenyon RD SB over Cn Rr And 7th Street

Carries Kenyon RD SB over Cn Rr And 7th Street, 1.5 Mi. N Of S Jct US 169.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT742 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

742 ft end to end, longest span 98 ft: about 2.1 football fields. 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 rigid-frame bridge.

Built1936rebuilt 1978
Length742.1 ft226.2 m
Daily traffic3,159counted 2021
Last inspectedMarch 2023every 24 months

Location

StateIowa
CountyWebster
Location1.5 Mi. N Of S Jct US 169
CarriesKenyon RD SB
CrossesCn Rr And 7th Street
Coordinates42.49906, -94.18650

Physical Characteristics

MaterialSteel Continuous
DesignFrame
Total Length742.1 ft (226.2 m)
Max Span98.1 ft (29.9 m)
Deck Width41.7 ft (12.7 m)
Deck Area2872.7 sq m
Main Spans7
Year Built1936 (reconstructed 1978)

Traffic

Avg Daily Traffic3,159 (2021)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000052101

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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