Structure 33523 · Kanabec County, MN

CR 55 over Groundhouse River

Carries CR 55 over Groundhouse River, 0.7 Mi W Of Jct TH 47.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT86 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

86 ft end to end, longest span 28 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built198541 years old
Length86.0 ft26.2 m
Daily traffic75counted 2014
Last inspectedNovember 2023every 24 months

Location

StateMinnesota
CountyKanabec
Location0.7 Mi W Of Jct TH 47
CarriesCR 55
CrossesGroundhouse River
Coordinates45.84747, -93.44523

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length86.0 ft (26.2 m)
Max Span27.9 ft (8.5 m)
Deck Width29.9 ft (9.1 m)
Deck Area238.4 sq m
Main Spans3
Year Built1985

Traffic

Avg Daily Traffic75 (2014)
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 Number33523

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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