Structure 55023 · Olmsted County, MN

Csah 36 over Marion Creek

Carries Csah 36 over Marion Creek, 0.3 Mi N Of Jct TH 52.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT139 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

139 ft end to end, longest span 46 ft. 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.

Built197056 years old
Length138.8 ft42.3 m
Daily traffic5,200counted 2014
Last inspectedNovember 2023every 24 months

Location

StateMinnesota
CountyOlmsted
Location0.3 Mi N Of Jct TH 52
CarriesCsah 36
CrossesMarion Creek
Coordinates43.96122, -92.37878

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length138.8 ft (42.3 m)
Max Span45.9 ft (14 m)
Deck Width40.4 ft (12.3 m)
Deck Area520.3 sq m
Main Spans3
Year Built1970

Traffic

Avg Daily Traffic5,200 (2014)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number55023

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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