Structure 1238 · Redwood County, MN

M 22 over Cottonwood River

Carries M 22 over Cottonwood River, 0.6 Mi S Of Jct Csah 15.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT142 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

142 ft end to end, longest span 38 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 girder bridge.

Built1918108 years old
Length142.4 ft43.4 m
Daily traffic70counted 1971
Last inspectedNovember 2024every 12 months

Location

StateMinnesota
CountyRedwood
Location0.6 Mi S Of Jct Csah 15
CarriesM 22
CrossesCottonwood River
Coordinates44.20102, -95.12822

Physical Characteristics

MaterialConcrete
DesignGirder and Floorbeam
Total Length142.4 ft (43.4 m)
Max Span38.1 ft (11.6 m)
Deck Width18.0 ft (5.5 m)
Deck Area238.7 sq m
Main Spans4
Year Built1918

Traffic

Avg Daily Traffic70 (1971)
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number1238

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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