Structure 5664 · Ramsey County, MN

Csah 55 over Bnsf Rr

Carries Csah 55 over Bnsf Rr, 0.8 Mi N Of Jct TH 94.

Overall conditionPoor

Set by its lowest-rated component: Superstructure and Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT486 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 4/9 · sets the rating

486 ft end to end, longest span 66 ft: about 7 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.

Built193987 years old
Length485.6 ft148 m
Daily traffic7,229counted 2011
Last inspectedApril 2024every 12 months

Location

StateMinnesota
CountyRamsey
Location0.8 Mi N Of Jct TH 94
CarriesCsah 55
CrossesBnsf Rr
Coordinates44.96287, -93.09792

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length485.6 ft (148 m)
Max Span65.9 ft (20.1 m)
Deck Width57.1 ft (17.4 m)
Deck Area2575.2 sq m
Main Spans9
Year Built1939

Traffic

Avg Daily Traffic7,229 (2011)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number5664

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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