Structure 69887 · St. Louis County, MN

I 35 over Unstable Material

Carries I 35 over Unstable Material, 0.3 Mi N Of Garfield AVE.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,109 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

2,109 ft end to end, longest span 56 ft: about 5.9 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 multi-beam bridge.

Built197056 years old
Length2108.6 ft642.7 m
Daily traffic45,454counted 2022
Last inspectedJune 2023every 24 months

Location

StateMinnesota
CountySt. Louis
Location0.3 Mi N Of Garfield AVE
CarriesI 35
CrossesUnstable Material
Coordinates46.77341, -92.11343

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length2108.6 ft (642.7 m)
Max Span56.1 ft (17.1 m)
Deck Width116.1 ft (35.4 m)
Deck Area22751.6 sq m
Main Spans38
Year Built1970

Traffic

Avg Daily Traffic45,454 (2022)
Truck Traffic5%
Lanes On Bridge6

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number69887

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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