Structure 69030 · St. Louis County, MN

US 53 over Cloquet River

Carries US 53 over Cloquet River, 0.2 Mi N Of Jct TH 33.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT295 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

295 ft end to end, longest span 115 ft: about 4 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.

Built196660 years old
Length294.9 ft89.9 m
Daily traffic5,150counted 2019
Last inspectedJune 2023every 24 months

Location

StateMinnesota
CountySt. Louis
Location0.2 Mi N Of Jct TH 33
CarriesUS 53
CrossesCloquet River
Coordinates46.95947, -92.45937

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length294.9 ft (89.9 m)
Max Span115.2 ft (35.1 m)
Deck Width42.3 ft (12.9 m)
Deck Area1159.7 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic5,150 (2019)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number69030

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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