Structure 9686 · Rock County, MN

I 90 over Bnsf Rr

Carries I 90 over Bnsf Rr, 0.3 Mi E Of S D ST Line.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT119 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

119 ft end to end, longest span 40 ft. Lengths and the car 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.

Built1960rebuilt 1982
Length119.4 ft36.4 m
Daily traffic7,555counted 2022
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyRock
Location0.3 Mi E Of S D ST Line
CarriesI 90
CrossesBnsf Rr
Coordinates43.60890, -96.44694

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length119.4 ft (36.4 m)
Max Span39.7 ft (12.1 m)
Deck Width44.3 ft (13.5 m)
Deck Area491.4 sq m
Main Spans3
Year Built1960 (reconstructed 1982)

Traffic

Avg Daily Traffic7,555 (2022)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number9686

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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