Structure 19011 · Dakota County, MN

Mn 50 over US 52

Carries Mn 50 over US 52, At Jct TH 50 In Hampton.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT169 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

169 ft end to end, longest span 46 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 slab bridge.

Built1962rebuilt 1999
Length168.6 ft51.4 m
Daily traffic5,700counted 2019
Last inspectedJuly 2024every 24 months

Location

StateMinnesota
CountyDakota
LocationAt Jct TH 50 In Hampton
CarriesMn 50
CrossesUS 52
Coordinates44.60126, -92.99336

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length168.6 ft (51.4 m)
Max Span46.3 ft (14.1 m)
Deck Width55.4 ft (16.9 m)
Deck Area868.7 sq m
Main Spans4
Year Built1962 (reconstructed 1999)

Traffic

Avg Daily Traffic5,700 (2019)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number19011

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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