Structure 89831 · Redwood County, MN

Csah 10 over Redwood River

Carries Csah 10 over Redwood River, 0.4 Mi S Of Jct Csah 30.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT126 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

126 ft end to end, longest span 61 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.

Built195769 years old
Length126.0 ft38.4 m
Daily traffic355counted 2019
Last inspectedNovember 2023every 24 months

Location

StateMinnesota
CountyRedwood
Location0.4 Mi S Of Jct Csah 30
CarriesCsah 10
CrossesRedwood River
Coordinates44.50154, -95.41138

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length126.0 ft (38.4 m)
Max Span61.4 ft (18.7 m)
Deck Width26.9 ft (8.2 m)
Deck Area314.9 sq m
Main Spans2
Year Built1957

Traffic

Avg Daily Traffic355 (2019)
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 Critical3 — Scour critical
Structure Number89831

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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