Structure B67011200000000 · Waukesha County, WI

IH 43 NB over Lrd Martin RD

Carries IH 43 NB over Lrd Martin RD, 0.9 Mi N Jct Cth Y.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT146 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

146 ft end to end, longest span 73 ft: about 2 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 multi-beam bridge.

Built196957 years old
Length146.3 ft44.6 m
Daily traffic27,600counted 2022
Last inspectedOctober 2024every 24 months

Location

StateWisconsin
CountyWaukesha
Location0.9 Mi N Jct Cth Y
CarriesIH 43 NB
CrossesLrd Martin RD
Coordinates42.93698, -88.14721

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length146.3 ft (44.6 m)
Max Span72.5 ft (22.1 m)
Deck Width59.4 ft (18.1 m)
Deck Area807.3 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic27,600 (2022)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB67011200000000

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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