Structure 58561 · Pine County, MN

CR 140 over Grindstone River

Carries CR 140 over Grindstone River, 0.2 Mi N Of Jct TH 48.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT124 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

124 ft end to end. 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.

Built20224 years old
Length124.3 ft37.9 m
Daily traffic665counted 2021
Last inspectedOctober 2024every 24 months

Location

StateMinnesota
CountyPine
Location0.2 Mi N Of Jct TH 48
CarriesCR 140
CrossesGrindstone River
Coordinates46.01416, -92.92693

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length124.3 ft (37.9 m)
Max Span122.0 ft (37.2 m)
Deck Width39.0 ft (11.9 m)
Deck Area451.0 sq m
Main Spans1
Year Built2022

Traffic

Avg Daily Traffic665 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number58561

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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