Structure 7512 · Blue Earth County, MN

Csah 16 over Le Sueur River

Carries Csah 16 over Le Sueur River, 1.2 Mi N Of Jct Csah 35.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT222 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 8/9

222 ft end to end, longest span 84 ft: about 3 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 multi-beam bridge.

Built196561 years old
Length222.1 ft67.7 m
Daily traffic1,450counted 2018
Last inspectedNovember 2024every 24 months

Location

StateMinnesota
CountyBlue Earth
Location1.2 Mi N Of Jct Csah 35
CarriesCsah 16
CrossesLe Sueur River
Coordinates44.08048, -94.00857

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length222.1 ft (67.7 m)
Max Span84.0 ft (25.6 m)
Deck Width32.8 ft (10 m)
Deck Area677 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic1,450 (2018)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number07512

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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