Structure 5508 · Benton County, MN

Csah 13 over Elk River

Carries Csah 13 over Elk River, 1.0 Mi W Of Jct Csah 3.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructure5/9 · Fair
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9Substructure 3/9 · sets the rating

81 ft end to end, longest span 31 ft. Lengths and the car 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 channel-beam bridge.

Built196858 years old
Length81.4 ft24.8 m
Daily traffic340counted 2021
Last inspectedOctober 2024every 12 months

Location

StateMinnesota
CountyBenton
Location1.0 Mi W Of Jct Csah 3
CarriesCsah 13
CrossesElk River
Coordinates45.71323, -94.00769

Physical Characteristics

MaterialPrestressed Concrete
DesignChannel Beam
Total Length81.4 ft (24.8 m)
Max Span31.2 ft (9.5 m)
Deck Width32.2 ft (9.8 m)
Deck Area243.0 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic340 (2021)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number05508

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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