US Bridges

Csah 23 over Vermillion River

Good

Dakota County, Minnesota · 0.6 MI N of JCT Csah 78 · Structure no. L3173

Built
1923
102 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
6,034
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 23 over Vermillion River is a concrete culvert carrying Csah 23 over Vermillion River in Dakota County, Minnesota. It was built in 1923, so it is 102 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,034 vehicles a day, roughly 5% of them trucks, projected to reach 5,800 by 2041. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCsah 23
CrossesVermillion River
Location0.6 MI N of JCT Csah 78
RouteCounty Highway 23
Coordinates44.61862, -93.21791
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,034 (2021)
Projected traffic5,800 by 2041
Trucks5%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 23 over Vermillion River built?

It was built in 1923, making it 102 years old in 2025.

What condition is Csah 23 over Vermillion River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Csah 23 over Vermillion River carry?

About 6,034 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Csah 23 over Vermillion River?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3 m).

Who owns Csah 23 over Vermillion River?

It is owned by the County Highway Agency.