Structure 3459 · Lake County, MN

Spr 20 over Baptism River

Carries Spr 20 over Baptism River, SW Of Bridge 38007.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT383 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 6/9

383 ft end to end: about 5 semi-trucks nose to tail. 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 deck truss.

Built1923103 years old
Length382.9 ft116.7 m
Daily traffic100counted 1985
Last inspectedOctober 2024every 12 months

Location

StateMinnesota
CountyLake
LocationSW Of Bridge 38007
CarriesSpr 20
CrossesBaptism River
Coordinates47.33714, -91.19990

Physical Characteristics

MaterialSteel
DesignTruss - Deck
Total Length382.9 ft (116.7 m)
Max Span140.1 ft (42.7 m)
Deck Width27.9 ft (8.5 m)
Deck Area992.0 sq m
Main Spans1
Year Built1923

Traffic

Avg Daily Traffic100 (1985)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerState Park/Forest Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number3459

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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