Structure 19865 · Dakota County, MN

I 494 over Csah 56 (concord Street)

Carries I 494 over Csah 56 (concord Street), At The Jct Csah 56; 494.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT170 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

170 ft end to end, longest span 91 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.

Built1980rebuilt 2019
Length170.3 ft51.9 m
Daily traffic103,528counted 2022
Last inspectedJune 2024every 24 months

Location

StateMinnesota
CountyDakota
LocationAt The Jct Csah 56; 494
CarriesI 494
CrossesCsah 56 (concord Street)
Coordinates44.87613, -93.03073

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length170.3 ft (51.9 m)
Max Span90.6 ft (27.6 m)
Deck Width148.0 ft (45.1 m)
Deck Area2340.7 sq m
Main Spans2
Year Built1980 (reconstructed 2019)

Traffic

Avg Daily Traffic103,528 (2022)
Truck Traffic6%
Lanes On Bridge8
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number19865

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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