Structure 49J68 · Morrison County, MN

Csah 48 over Platte River

Carries Csah 48 over Platte River, 0.5 Mi E Of Jct TH 25.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 60 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built201214 years old
Length59.7 ft18.2 m
Daily traffic564counted 2022
Last inspectedNovember 2024every 48 months

Location

StateMinnesota
CountyMorrison
Location0.5 Mi E Of Jct TH 25
CarriesCsah 48
CrossesPlatte River
Coordinates46.09959, -94.09226

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length59.7 ft (18.2 m)
Max Span18.4 ft (5.6 m)
Deck Area200.2 sq m
Main Spans3
Year Built2012

Traffic

Avg Daily Traffic564 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number49J68

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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