US Bridges

Csah 4 over Stream

Fair

Rock County, Minnesota · 1.1 MI W of JCT Csah 3 · Structure no. 6054

Built
1925
100 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
1,260
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Stream is a concrete culvert carrying Csah 4 over Stream in Rock County, Minnesota. It was built in 1925, so it is 100 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 1,260 vehicles a day, projected to reach 1,500 by 2042. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesStream
Location1.1 MI W of JCT Csah 3
RouteCounty Highway 4
CountyRock County
StateMinnesota
Coordinates43.64536, -96.11537
Functional classRural Major 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
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 inspectionSeptember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (6.9 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 traffic1,260 (2022)
Projected traffic1,500 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$135 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 4 over Stream built?

It was built in 1925, making it 100 years old in 2025.

What condition is Csah 4 over Stream 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 September 2024.

How much traffic does Csah 4 over Stream carry?

About 1,260 vehicles per day (2022 count).

How long is Csah 4 over Stream?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3.2 m).

Who owns Csah 4 over Stream?

It is owned by the County Highway Agency.