Structure 25525 · Goodhue County, MN

M 51 over Spring Creek

Carries M 51 over Spring Creek, 0.5 Mi E Of Jct TH 19.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT74 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

74 ft end to end. Lengths and the car 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 tee-beam bridge.

Built197848 years old
Length73.8 ft22.5 m
Daily traffic271counted 2022
Last inspectedOctober 2024every 12 months

Location

StateMinnesota
CountyGoodhue
Location0.5 Mi E Of Jct TH 19
CarriesM 51
CrossesSpring Creek
Coordinates44.55740, -92.63269

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length73.8 ft (22.5 m)
Max Span72.5 ft (22.1 m)
Deck Width47.9 ft (14.6 m)
Deck Area328.5 sq m
Main Spans1
Year Built1978

Traffic

Avg Daily Traffic271 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number25525

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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