Structure 7602 · Blue Earth County, MN

Csah 13 over Blue Earth River

Carries Csah 13 over Blue Earth River, 1.8 Mi W Of Jct Csah 1.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT270 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

270 ft end to end, longest span 134 ft: about 4 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.

Built20242 years old
Length270.0 ft82.3 m
Daily traffic360counted 2023
Last inspectedDecember 2024every 24 months

Location

StateMinnesota
CountyBlue Earth
Location1.8 Mi W Of Jct Csah 1
CarriesCsah 13
CrossesBlue Earth River
Coordinates44.01064, -94.11169

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length270.0 ft (82.3 m)
Max Span133.9 ft (40.8 m)
Deck Width39.0 ft (11.9 m)
Deck Area979.4 sq m
Main Spans2
Year Built2024

Traffic

Avg Daily Traffic360 (2023)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number07602

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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