Structure B37036000010000 · Marathon County, WI

Ush51nb To Sth29wb over Canadian National Rr

Carries Ush51nb To Sth29wb over Canadian National Rr, 1.8m N Of Rib Mountain DR.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT620 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

620 ft end to end, longest span 131 ft: about 1.7 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 multi-beam bridge.

Built200818 years old
Length620.1 ft189 m
Daily traffic7,200counted 2022
Last inspectedJune 2024every 48 months

Location

StateWisconsin
CountyMarathon
Location1.8m N Of Rib Mountain DR
CarriesUsh51nb To Sth29wb
CrossesCanadian National Rr
Coordinates44.95342, -89.66861

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length620.1 ft (189 m)
Max Span130.6 ft (39.8 m)
Deck Width43.0 ft (13.1 m)
Deck Area2475.9 sq m
Main Spans5
Year Built2008

Traffic

Avg Daily Traffic7,200 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB37036000010000

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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