Structure 53J73 · Nobles County, MN

Csah 13 over Little Rock River

Carries Csah 13 over Little Rock River, 0.7 Mi N Of Jct Csah 6.

Overall conditionGood

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

How ratings work
Culvertsets the rating9/9 · Excellent
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 9/9

A culvert 61 ft across with 4 openings. 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, so those are drawn as typical for a culvert.

Built200917 years old
Length61.4 ft18.7 m
Daily traffic620counted 2019
Last inspectedOctober 2021every 48 months

Location

StateMinnesota
CountyNobles
Location0.7 Mi N Of Jct Csah 6
CarriesCsah 13
CrossesLittle Rock River
Coordinates43.55384, -95.79389

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length61.4 ft (18.7 m)
Max Span14.1 ft (4.3 m)
Deck Area183.3 sq m
Main Spans4
Year Built2009

Traffic

Avg Daily Traffic620 (2019)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2021
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53J73

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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