Structure P39002900000000 · Marquette County, WI

Cth E over Montello River

Carries Cth E over Montello River, 0.2m E Jct Cth B To S.

Overall conditionPoor

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 4/9 · sets the rating

48 ft end to end, longest span 16 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built196660 years old
Length47.9 ft14.6 m
Daily traffic600counted 2024
Last inspectedAugust 2024every 12 months

Location

StateWisconsin
CountyMarquette
Location0.2m E Jct Cth B To S
CarriesCth E
CrossesMontello River
Coordinates43.89820, -89.40532

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length47.9 ft (14.6 m)
Max Span16.1 ft (4.9 m)
Deck Width26.2 ft (8 m)
Deck Area116.8 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic600 (2024)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberP39002900000000

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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