Structure L1490 · Winona County, MN

T 315 over Stream

Carries T 315 over Stream, 0.2 Mi S Of Jct Csah 15.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
20 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

20 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built1915111 years old
Length20.3 ft6.2 m
Daily traffic6counted 1986
Last inspectedOctober 2023every 24 months

Location

StateMinnesota
CountyWinona
Location0.2 Mi S Of Jct Csah 15
CarriesT 315
CrossesStream
Coordinates44.01954, -91.56113

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length20.3 ft (6.2 m)
Max Span15.1 ft (4.6 m)
Deck Width17.4 ft (5.3 m)
Deck Area32.9 sq m
Main Spans1
Year Built1915

Traffic

Avg Daily Traffic6 (1986)
Lanes On Bridge1

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 NumberL1490

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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