Structure P40084200000000 · Milwaukee County, WI

Lrd S 20th ST over Kinnickinnic River

Carries Lrd S 20th ST over Kinnickinnic River, 2.1m S Jct Sth 59.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 39 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built193888 years old
Length39.0 ft11.9 m
Daily traffic7,804counted 2022
Last inspectedJune 2024every 24 months

Location

StateWisconsin
CountyMilwaukee
Location2.1m S Jct Sth 59
CarriesLrd S 20th ST
CrossesKinnickinnic River
Coordinates42.99153, -87.93844

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length39.0 ft (11.9 m)
Max Span12.1 ft (3.7 m)
Deck Area145.2 sq m
Main Spans3
Year Built1938

Traffic

Avg Daily Traffic7,804 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberP40084200000000

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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