Structure L5901 · Goodhue County, MN

M 12 over Stream

Carries M 12 over Stream, In Zumbrota.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 0 of 9.

How ratings work
Deck4/9 · Poor
Superstructure4/9 · Poor
Substructuresets the rating0/9 · Failed
Channelnot part of overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
22 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 0/9 · sets the rating

22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built193591 years old
Length21.7 ft6.6 m
Daily traffic60counted 1986
Last inspectedNovember 2009every 12 months

Location

StateMinnesota
CountyGoodhue
LocationIn Zumbrota
CarriesM 12
CrossesStream
Coordinates44.29629, -92.67355

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length21.7 ft (6.6 m)
Max Span21.7 ft (6.6 m)
Deck Width16.1 ft (4.9 m)
Deck Area32.3 sq m
Main Spans1
Year Built1935

Traffic

Avg Daily Traffic60 (1986)
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2009
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure NumberL5901

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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