US Bridges

Csah 9 over Watonwan River

FairPosted for load

Cottonwood County, Minnesota · 0.2 MI S of JCT Csah 9 · Structure no. 89567

Built
1933
92 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
156
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 9 over Watonwan River is a steel stringer/multi-beam or girder carrying Csah 9 over Watonwan River in Cottonwood County, Minnesota. It was built in 1933, so it is 92 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 156 vehicles a day, projected to reach 120 by 2041. The structure is 32 ft (9.8 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCsah 9
CrossesWatonwan River
Location0.2 MI S of JCT Csah 9
RouteCounty Highway 9
CountyCottonwood County
StateMinnesota
Coordinates43.97401, -94.99923
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36.4 US tons
Inventory rating21.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic156 (2021)
Projected traffic120 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$250 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 9 over Watonwan River built?

It was built in 1933, making it 92 years old in 2025.

What condition is Csah 9 over Watonwan River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Csah 9 over Watonwan River carry?

About 156 vehicles per day (2021 count).

How long is Csah 9 over Watonwan River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Csah 9 over Watonwan River?

It is owned by the County Highway Agency.