Structure 37536 · Lac qui Parle County, MN

Csah 20 over Lac Qui Parle River

Carries Csah 20 over Lac Qui Parle River, 1.1 Mi W Of Jct CR 75.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT191 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 8/9 · sets the rating

191 ft end to end, longest span 63 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 multi-beam bridge.

Built201313 years old
Length190.9 ft58.2 m
Daily traffic530counted 2016
Last inspectedJune 2023every 24 months

Location

StateMinnesota
CountyLac qui Parle
Location1.1 Mi W Of Jct CR 75
CarriesCsah 20
CrossesLac Qui Parle River
Coordinates44.99355, -95.90189

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length190.9 ft (58.2 m)
Max Span63.3 ft (19.3 m)
Deck Width38.4 ft (11.7 m)
Deck Area680.9 sq m
Main Spans3
Year Built2013

Traffic

Avg Daily Traffic530 (2016)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number37536

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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