Structure 6391 · Lac qui Parle County, MN

Csah #33 over Minn. Riv.

Carries Csah #33 over Minn. Riv., 4 Mi. Wnw Of Watson Mn.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT239 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

239 ft end to end, longest span 20 ft: about 3 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 slab bridge.

Built1938rebuilt 1996
Length239.2 ft72.9 m
Daily traffic330counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateMinnesota
CountyLac qui Parle
Location4 Mi. Wnw Of Watson Mn
CarriesCsah #33
CrossesMinn. Riv.
Coordinates45.02194, -95.86917

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length239.2 ft (72.9 m)
Max Span19.7 ft (6 m)
Deck Width48.9 ft (14.9 m)
Deck Area1086.2 sq m
Main Spans12
Year Built1938 (reconstructed 1996)

Traffic

Avg Daily Traffic330 (2021)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCorps of Engineers
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000006391

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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