Structure 24838 · Freeborn County, MN

I 90 over Im Rail

Carries I 90 over Im Rail, 2.7 Mi E Of Jct TH 109.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT174 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

174 ft end to end, longest span 57 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.

Built197056 years old
Length174.2 ft53.1 m
Daily traffic4,355counted 2021
Last inspectedAugust 2023every 24 months

Location

StateMinnesota
CountyFreeborn
Location2.7 Mi E Of Jct TH 109
CarriesI 90
CrossesIm Rail
Coordinates43.66956, -93.51105

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length174.2 ft (53.1 m)
Max Span56.8 ft (17.3 m)
Deck Width44.6 ft (13.6 m)
Deck Area722.2 sq m
Main Spans3
Year Built1970

Traffic

Avg Daily Traffic4,355 (2021)
Truck Traffic28%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number24838

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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