Structure 83025 · Watonwan County, MN

Csah 15 over Mn 60

Carries Csah 15 over Mn 60, 1.4 Mi NE Of Jct TH 4.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT342 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

342 ft end to end, longest span 95 ft: about 5 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.

Built197749 years old
Length341.9 ft104.2 m
Daily traffic235counted 2016
Last inspectedJuly 2024every 24 months

Location

StateMinnesota
CountyWatonwan
Location1.4 Mi NE Of Jct TH 4
CarriesCsah 15
CrossesMn 60
Coordinates43.96236, -94.63958

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length341.9 ft (104.2 m)
Max Span95.1 ft (29 m)
Deck Width35.8 ft (10.9 m)
Deck Area1135.8 sq m
Main Spans4
Year Built1977

Traffic

Avg Daily Traffic235 (2016)
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 Number83025

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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