Structure 69025 · St. Louis County, MN

Mn 135 over Dm&ir Ry

Carries Mn 135 over Dm&ir Ry, 9.5 Mi E Of S Jct Th53.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating3/9 · Serious
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT179 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 3/9 · sets the ratingSubstructure 7/9

179 ft end to end, longest span 73 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 multi-beam bridge.

Built197155 years old
Length179.1 ft54.6 m
Daily traffic3,830counted 2022
Last inspectedNovember 2024every 12 months

Location

StateMinnesota
CountySt. Louis
Location9.5 Mi E Of S Jct Th53
CarriesMn 135
CrossesDm&ir Ry
Coordinates47.52394, -92.35603

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length179.1 ft (54.6 m)
Max Span72.8 ft (22.2 m)
Deck Width48.2 ft (14.7 m)
Deck Area802.6 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic3,830 (2022)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number69025

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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