Structure B53009800000000 · Rock County, WI

Lrd E Memorial DR over Ush 51-n Parker DR

Carries Lrd E Memorial DR over Ush 51-n Parker DR, 0.8m W Jct Sth 26.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
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 7/9Substructure 5/9 · sets the rating

146 ft end to end, longest span 76 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.

Built1970rebuilt 2005
Length145.7 ft44.4 m
Daily traffic16,400counted 2022
Last inspectedAugust 2024every 24 months

Location

StateWisconsin
CountyRock
Location0.8m W Jct Sth 26
CarriesLrd E Memorial DR
CrossesUsh 51-n Parker DR
Coordinates42.69376, -89.02957

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length145.7 ft (44.4 m)
Max Span76.1 ft (23.2 m)
Deck Width79.1 ft (24.1 m)
Deck Area1070.0 sq m
Main Spans2
Year Built1970 (reconstructed 2005)

Traffic

Avg Daily Traffic16,400 (2022)
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB53009800000000

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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