Structure 9232 · St. Louis County, MN

Mn 73 over Bnsf Rr

Carries Mn 73 over Bnsf Rr, 2.5 Mi S Of S Jct TH 169.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT128 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

128 ft end to end, longest span 43 ft. 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.

Built195868 years old
Length127.6 ft38.9 m
Daily traffic1,300counted 2019
Last inspectedMay 2023every 24 months

Location

StateMinnesota
CountySt. Louis
Location2.5 Mi S Of S Jct TH 169
CarriesMn 73
CrossesBnsf Rr
Coordinates47.36818, -92.98596

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length127.6 ft (38.9 m)
Max Span42.7 ft (13 m)
Deck Width35.4 ft (10.8 m)
Deck Area420.1 sq m
Main Spans3
Year Built1958

Traffic

Avg Daily Traffic1,300 (2019)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number9232

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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