Structure 59519 · Pipestone County, MN

T 18 over Rock River

Carries T 18 over Rock River, 0.4 Mi E Of Jct Csah 17.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure and Substructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
Channelnot part of overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT116 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 4/9

116 ft end to end, longest span 32 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.

Built198442 years old
Length116.1 ft35.4 m
Daily traffic22counted 1986
Last inspectedOctober 2024every 24 months

Location

StateMinnesota
CountyPipestone
Location0.4 Mi E Of Jct Csah 17
CarriesT 18
CrossesRock River
Coordinates43.93571, -96.13624

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length116.1 ft (35.4 m)
Max Span32.2 ft (9.8 m)
Deck Width25.9 ft (7.9 m)
Deck Area279.7 sq m
Main Spans4
Year Built1984

Traffic

Avg Daily Traffic22 (1986)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number59519

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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