Structure 54536 · Norman County, MN

Csah 4 over Wild Rice River

Carries Csah 4 over Wild Rice River, 0.4 Mi N Of Jct CR 189.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT391 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

391 ft end to end, longest span 148 ft: 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 multi-beam bridge.

Built198739 years old
Length390.7 ft119.1 m
Daily traffic129counted 2021
Last inspectedJuly 2023every 24 months

Location

StateMinnesota
CountyNorman
Location0.4 Mi N Of Jct CR 189
CarriesCsah 4
CrossesWild Rice River
Coordinates47.21549, -96.77490

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length390.7 ft (119.1 m)
Max Span148.0 ft (45.1 m)
Deck Width35.4 ft (10.8 m)
Deck Area1286.3 sq m
Main Spans3
Year Built1987

Traffic

Avg Daily Traffic129 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number54536

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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