Structure P25012800000000 · Iowa County, WI

Lrd Twin Bridge RD over Dodge Branch

Carries Lrd Twin Bridge RD over Dodge Branch, 2.4m N Jct Sth 39.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT46 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

46 ft end to end. 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 multi-beam bridge.

Built196066 years old
Length46.3 ft14.1 m
Daily traffic156counted 2022
Last inspectedOctober 2024every 24 months

Location

StateWisconsin
CountyIowa
Location2.4m N Jct Sth 39
CarriesLrd Twin Bridge RD
CrossesDodge Branch
Coordinates42.90281, -90.04492

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length46.3 ft (14.1 m)
Max Span44.6 ft (13.6 m)
Deck Width30.5 ft (9.3 m)
Deck Area131.1 sq m
Main Spans1
Year Built1960

Traffic

Avg Daily Traffic156 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberP25012800000000

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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