Structure 7275 · Wilkin County, MN

Csah 19 over Otter Tail River

Carries Csah 19 over Otter Tail River, 0.8 Mi S Of Jct Cr160.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT177 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

177 ft end to end, longest span 66 ft: about 2 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.

Built195967 years old
Length177.2 ft54 m
Daily traffic305counted 2018
Last inspectedSeptember 2023every 24 months

Location

StateMinnesota
CountyWilkin
Location0.8 Mi S Of Jct Cr160
CarriesCsah 19
CrossesOtter Tail River
Coordinates46.21343, -96.30698

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length177.2 ft (54 m)
Max Span65.9 ft (20.1 m)
Deck Width32.5 ft (9.9 m)
Deck Area534.6 sq m
Main Spans3
Year Built1959

Traffic

Avg Daily Traffic305 (2018)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number7275

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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