Structure B13031700000000 · Dane County, WI

Ush 12/18 Eb-s Bel over Cth Bb Monona DR

Carries Ush 12/18 Eb-s Bel over Cth Bb Monona DR, 2.3m E Jct Cth Mc.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT137 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

137 ft end to end, longest span 67 ft. 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.

Built198838 years old
Length137.5 ft41.9 m
Daily traffic58,500counted 2022
Last inspectedJuly 2023every 24 months

Location

StateWisconsin
CountyDane
Location2.3m E Jct Cth Mc
CarriesUsh 12/18 Eb-s Bel
CrossesCth Bb Monona DR
Coordinates43.04467, -89.32443

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length137.5 ft (41.9 m)
Max Span66.9 ft (20.4 m)
Deck Width55.8 ft (17 m)
Deck Area712.3 sq m
Main Spans2
Year Built1988

Traffic

Avg Daily Traffic58,500 (2022)
Truck Traffic1%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB13031700000000

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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