Structure 5525 · Benton County, MN

Csah 29 over Miss R Bnsf Rr; Str

Carries Csah 29 over Miss R Bnsf Rr; Str, 1.5 Mi W Of Jct TH 10.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,173 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

1,173 ft end to end, longest span 120 ft: about 3.3 football fields. 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.

Built198343 years old
Length1172.9 ft357.5 m
Daily traffic12,500counted 2017
Last inspectedSeptember 2024every 24 months

Location

StateMinnesota
CountyBenton
Location1.5 Mi W Of Jct TH 10
CarriesCsah 29
CrossesMiss R Bnsf Rr; Str
Coordinates45.61615, -94.20129

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1172.9 ft (357.5 m)
Max Span120.1 ft (36.6 m)
Deck Width52.8 ft (16.1 m)
Deck Area5755.8 sq m
Main Spans11
Year Built1983

Traffic

Avg Daily Traffic12,500 (2017)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge3

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number05525

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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