Structure 19857 · Dakota County, MN

Mn 149 over I 494

Carries Mn 149 over I 494, 0.8 Mi E Of Jct TH 35e.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT314 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

314 ft end to end, longest span 155 ft: about 4 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.

Built198442 years old
Length314.0 ft95.7 m
Daily traffic22,900counted 2015
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyDakota
Location0.8 Mi E Of Jct TH 35e
CarriesMn 149
CrossesI 494
Coordinates44.86270, -93.12956

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length314.0 ft (95.7 m)
Max Span154.9 ft (47.2 m)
Deck Width102.7 ft (31.3 m)
Deck Area2995.4 sq m
Main Spans2
Year Built1984

Traffic

Avg Daily Traffic22,900 (2015)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge8

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 Number19857

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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