US Bridges

Csah 24 over Vermillion River

Fair

St. Louis County, Minnesota · 0.1 MI N of JCT Csah 23 · Structure no. 7221

Built
1962
63 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
3 main spans
Daily traffic
455
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 24 over Vermillion River is a steel continuous stringer/multi-beam or girder carrying Csah 24 over Vermillion River in St. Louis County, Minnesota. It was built in 1962, so it is 63 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 6 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 455 vehicles a day, projected to reach 435 by 2039. The structure is 212 ft (64.7 m) long and 31 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

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CarriesCsah 24
CrossesVermillion River
Location0.1 MI N of JCT Csah 23
RouteCounty Highway 24
CountySt. Louis County
StateMinnesota
Coordinates48.1238, -92.52315
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: 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 rating46.6 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length212 ft (64.7 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic455 (2019)
Projected traffic435 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 24 over Vermillion River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Csah 24 over Vermillion 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 July 2023.

How much traffic does Csah 24 over Vermillion River carry?

About 455 vehicles per day (2019 count).

How long is Csah 24 over Vermillion River?

The structure is 212 ft (64.7 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Csah 24 over Vermillion River?

It is owned by the County Highway Agency.