Structure B37014800000000 · Marathon County, WI

IH Ush 51-ih 39 SB over Sth 153

Carries IH Ush 51-ih 39 SB over Sth 153, 8.8m S Jct Sth 29 To E.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT167 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

167 ft end to end, longest span 84 ft: about 2 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.

Built1973rebuilt 2015
Length167.3 ft51 m
Daily traffic29,800counted 2022
Last inspectedJune 2024every 24 months

Location

StateWisconsin
CountyMarathon
Location8.8m S Jct Sth 29 To E
CarriesIH Ush 51-ih 39 SB
CrossesSth 153
Coordinates44.78641, -89.68074

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length167.3 ft (51 m)
Max Span84.0 ft (25.6 m)
Deck Width42.7 ft (13 m)
Deck Area663 sq m
Main Spans2
Year Built1973 (reconstructed 2015)

Traffic

Avg Daily Traffic29,800 (2022)
Truck Traffic18%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB37014800000000

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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