Structure 59007 · Pipestone County, MN

Csah 9 over Rock River

Carries Csah 9 over Rock River, 0.8 Mi W Of Jct Csah 17 N.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT149 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

149 ft end to end, longest span 50 ft: about 2 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.

Built200125 years old
Length149.3 ft45.5 m
Daily traffic1,405counted 2022
Last inspectedAugust 2024every 24 months

Location

StateMinnesota
CountyPipestone
Location0.8 Mi W Of Jct Csah 17 N
CarriesCsah 9
CrossesRock River
Coordinates43.87755, -96.14993

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length149.3 ft (45.5 m)
Max Span49.5 ft (15.1 m)
Deck Width42.7 ft (13 m)
Deck Area591.5 sq m
Main Spans3
Year Built2001

Traffic

Avg Daily Traffic1,405 (2022)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number59007

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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