Structure B05013400190000 · Brown County, WI

Sth 54 EB & WB (ma over Sth Madison ST

Carries Sth 54 EB & WB (ma over Sth Madison ST, 0.6m W Jct Sth 29 To W.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT349 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

349 ft end to end, longest span 90 ft: about 5 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.

Built197353 years old
Length348.8 ft106.3 m
Daily traffic38,800counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateWisconsin
CountyBrown
Location0.6m W Jct Sth 29 To W
CarriesSth 54 EB & WB (ma
CrossesSth Madison ST
Coordinates44.50699, -88.01750

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length348.8 ft (106.3 m)
Max Span90.2 ft (27.5 m)
Deck Width86.0 ft (26.2 m)
Deck Area2785.1 sq m
Main Spans4
Year Built1973

Traffic

Avg Daily Traffic38,800 (2021)
Truck Traffic10%
Lanes On Bridge7
Lanes Under Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB05013400190000

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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