Structure B36012800020000 · Manitowoc County, WI

Sth 42 over Manitowoc River

Carries Sth 42 over Manitowoc River, At Manitowoc River.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT202 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 6/9

202 ft end to end: about 3 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 bascule bridge (drawn closed).

Built198739 years old
Length202.1 ft61.6 m
Daily traffic10,900counted 2023
Last inspectedMay 2024every 12 months

Location

StateWisconsin
CountyManitowoc
LocationAt Manitowoc River
CarriesSth 42
CrossesManitowoc River
Coordinates44.09195, -87.66048

Physical Characteristics

MaterialSteel
DesignMovable - Bascule
Total Length202.1 ft (61.6 m)
Max Span171.9 ft (52.4 m)
Deck Width65.9 ft (20.1 m)
Deck Area1238.2 sq m
Main Spans1
Year Built1987

Traffic

Avg Daily Traffic10,900 (2023)
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberB36012800020000

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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