Structure 21809 · Douglas County, MN

Csah 15 over I 94

Carries Csah 15 over I 94, 5.0 Mi SE Of Jct TH 79.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

233 ft end to end, longest span 73 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.

Built196660 years old
Length233.3 ft71.1 m
Daily traffic75counted 2018
Last inspectedAugust 2024every 24 months

Location

StateMinnesota
CountyDouglas
Location5.0 Mi SE Of Jct TH 79
CarriesCsah 15
CrossesI 94
Coordinates45.96887, -95.64495

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length233.3 ft (71.1 m)
Max Span72.8 ft (22.2 m)
Deck Width33.8 ft (10.3 m)
Deck Area732.3 sq m
Main Spans4
Year Built1966

Traffic

Avg Daily Traffic75 (2018)
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number21809

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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