Structure 9377 · Ramsey County, MN

Mn 51 over I 94

Carries Mn 51 over I 94, At Jct TH 94; 51.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT213 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

213 ft end to end, longest span 71 ft: about 3 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.

Built196264 years old
Length213.3 ft65 m
Daily traffic33,500counted 2014
Last inspectedJune 2024every 24 months

Location

StateMinnesota
CountyRamsey
LocationAt Jct TH 94; 51
CarriesMn 51
CrossesI 94
Coordinates44.95167, -93.16708

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length213.3 ft (65 m)
Max Span71.2 ft (21.7 m)
Deck Width132.2 ft (40.3 m)
Deck Area2619.5 sq m
Main Spans4
Year Built1962

Traffic

Avg Daily Traffic33,500 (2014)
Truck Traffic3%
Lanes On Bridge8
Lanes Under Bridge6

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 Number9377

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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