Structure 19053 · Dakota County, MN

Csah 30 over TH 77

Carries Csah 30 over TH 77, 0.7 Mi S Of Jct TH 13.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT345 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

345 ft end to end, longest span 109 ft: about 5 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.

Built197848 years old
Length345.1 ft105.2 m
Daily traffic9,059counted 2022
Last inspectedJuly 2024every 24 months

Location

StateMinnesota
CountyDakota
Location0.7 Mi S Of Jct TH 13
CarriesCsah 30
CrossesTH 77
Coordinates44.80476, -93.22106

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length345.1 ft (105.2 m)
Max Span108.9 ft (33.2 m)
Deck Width92.2 ft (28.1 m)
Deck Area2956.1 sq m
Main Spans4
Year Built1978

Traffic

Avg Daily Traffic9,059 (2022)
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number19053

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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