Structure 77534 · Todd County, MN

CR 90 over Long Prairie River

Carries CR 90 over Long Prairie River, 0.5 Mi E Of Jct TH 71.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT139 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

139 ft end to end, longest span 52 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 slab bridge.

Built200818 years old
Length139.1 ft42.4 m
Daily traffic70counted 2018
Last inspectedSeptember 2024every 24 months

Location

StateMinnesota
CountyTodd
Location0.5 Mi E Of Jct TH 71
CarriesCR 90
CrossesLong Prairie River
Coordinates46.05250, -94.85745

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length139.1 ft (42.4 m)
Max Span52.2 ft (15.9 m)
Deck Width35.4 ft (10.8 m)
Deck Area457.9 sq m
Main Spans3
Year Built2008

Traffic

Avg Daily Traffic70 (2018)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number77534

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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