Structure 55009 · Olmsted County, MN

US 52 over TH 63

Carries US 52 over TH 63, At The Jct Of TH 63.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT306 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

306 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 multi-beam bridge.

Built1973rebuilt 2016
Length306.4 ft93.4 m
Daily traffic21,859counted 2021
Last inspectedOctober 2024every 24 months

Location

StateMinnesota
CountyOlmsted
LocationAt The Jct Of TH 63
CarriesUS 52
CrossesTH 63
Coordinates43.97684, -92.46271

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length306.4 ft (93.4 m)
Max Span96.1 ft (29.3 m)
Deck Width57.1 ft (17.4 m)
Deck Area1625.2 sq m
Main Spans4
Year Built1973 (reconstructed 2016)

Traffic

Avg Daily Traffic21,859 (2021)
Truck Traffic13%
Lanes On Bridge3
Lanes Under Bridge8

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 Number55009

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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