Structure B17012500000000 · Dunn County, WI

Lrd 550th AVE over Gilbert Creek

Carries Lrd 550th AVE over Gilbert Creek, 1.0m S Jct Sth 29.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT122 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 6/9

122 ft end to end, longest span 52 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 slab bridge.

Built198937 years old
Length122.0 ft37.2 m
Daily traffic170counted 2024
Last inspectedJuly 2024every 24 months

Location

StateWisconsin
CountyDunn
Location1.0m S Jct Sth 29
CarriesLrd 550th AVE
CrossesGilbert Creek
Coordinates44.88296, -91.96808

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length122.0 ft (37.2 m)
Max Span51.8 ft (15.8 m)
Deck Width26.2 ft (8 m)
Deck Area297.6 sq m
Main Spans3
Year Built1989

Traffic

Avg Daily Traffic170 (2024)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberB17012500000000

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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