Structure 58520 · Pine County, MN

Csah 61 over Kettle River

Carries Csah 61 over Kettle River, 0.1 Mi S Of Jct Csah 33.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT197 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

197 ft end to end, longest span 65 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 tee-beam bridge.

Built198046 years old
Length197.2 ft60.1 m
Daily traffic1,028counted 2022
Last inspectedNovember 2023every 24 months

Location

StateMinnesota
CountyPine
Location0.1 Mi S Of Jct Csah 33
CarriesCsah 61
CrossesKettle River
Coordinates46.26844, -92.86146

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length197.2 ft (60.1 m)
Max Span65.3 ft (19.9 m)
Deck Width47.9 ft (14.6 m)
Deck Area877.5 sq m
Main Spans3
Year Built1980

Traffic

Avg Daily Traffic1,028 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number58520

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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