Structure 17505 · Cottonwood County, MN

Csah 13 over Perkins Creek

Carries Csah 13 over Perkins Creek, 1.0 Mi W Of Jct TH 71.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

31 ft end to end. Lengths and the car 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 channel-beam bridge.

Built196264 years old
Length30.8 ft9.4 m
Daily traffic2,075counted 2021
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyCottonwood
Location1.0 Mi W Of Jct TH 71
CarriesCsah 13
CrossesPerkins Creek
Coordinates43.87293, -95.13139

Physical Characteristics

MaterialPrestressed Concrete
DesignChannel Beam
Total Length30.8 ft (9.4 m)
Max Span27.9 ft (8.5 m)
Deck Width50.2 ft (15.3 m)
Deck Area143.8 sq m
Main Spans1
Year Built1962

Traffic

Avg Daily Traffic2,075 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number17505

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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