US Bridges

Csah 4 over S Fk Zumbro River

Fair

Dodge County, Minnesota · 0.6 MI E of JCT Csah 9 · Structure no. 89083

Built
1935
90 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
312
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over S Fk Zumbro River is a concrete culvert carrying Csah 4 over S Fk Zumbro River in Dodge County, Minnesota. It was built in 1935, so it is 90 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.

It carries about 312 vehicles a day, projected to reach 270 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesS Fk Zumbro River
Location0.6 MI E of JCT Csah 9
RouteCounty Highway 4
CountyDodge County
StateMinnesota
Coordinates43.92122, -92.78592
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic312 (2021)
Projected traffic270 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$46 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 4 over S Fk Zumbro River built?

It was built in 1935, making it 90 years old in 2025.

What condition is Csah 4 over S Fk Zumbro 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 4 over S Fk Zumbro River carry?

About 312 vehicles per day (2021 count).

How long is Csah 4 over S Fk Zumbro River?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m).

Who owns Csah 4 over S Fk Zumbro River?

It is owned by the County Highway Agency.