Structure 9110 · Dakota County, MN

Mn 55 over US 52 NB

Carries Mn 55 over US 52 NB, At The W Jct TH 55.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT314 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

314 ft end to end, longest span 96 ft: about 4 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 box-beam bridge.

Built195868 years old
Length314.0 ft95.7 m
Daily traffic6,400counted 2015
Last inspectedJuly 2024every 12 months

Location

StateMinnesota
CountyDakota
LocationAt The W Jct TH 55
CarriesMn 55
CrossesUS 52 NB
Coordinates44.76512, -93.03368

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length314.0 ft (95.7 m)
Max Span96.1 ft (29.3 m)
Deck Width36.4 ft (11.1 m)
Deck Area1062.3 sq m
Main Spans3
Year Built1958

Traffic

Avg Daily Traffic6,400 (2015)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number9110

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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