Structure 87547 · Yellow Medicine County, MN

T 84 over Spring Creek

Carries T 84 over Spring Creek, 0.1 Mi N Of Jct Csah 3.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT83 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

83 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.

Built197848 years old
Length83.3 ft25.4 m
Daily traffic20counted 1990
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyYellow Medicine
Location0.1 Mi N Of Jct Csah 3
CarriesT 84
CrossesSpring Creek
Coordinates44.71957, -95.70632

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length83.3 ft (25.4 m)
Max Span31.8 ft (9.7 m)
Deck Width29.9 ft (9.1 m)
Deck Area231.1 sq m
Main Spans3
Year Built1978

Traffic

Avg Daily Traffic20 (1990)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number87547

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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