Structure 6313 · St. Louis County, MN

Mn 23 over ST Louis River

Carries Mn 23 over ST Louis River, At Wis State Line.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT680 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

680 ft end to end, longest span 126 ft: about 1.9 football fields. 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 deck arch.

Built1919rebuilt 2016
Length680.4 ft207.4 m
Daily traffic1,650counted 2019
Last inspectedSeptember 2023every 24 months

Location

StateMinnesota
CountySt. Louis
LocationAt Wis State Line
CarriesMn 23
CrossesST Louis River
Coordinates46.65896, -92.28354

Physical Characteristics

MaterialConcrete Continuous
DesignArch - Deck
Total Length680.4 ft (207.4 m)
Max Span126.3 ft (38.5 m)
Deck Width48.2 ft (14.7 m)
Deck Area3048.8 sq m
Main Spans6
Year Built1919 (reconstructed 2016)

Traffic

Avg Daily Traffic1,650 (2019)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number6313

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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