US Bridges

Csah 52 over ST Louis River

Good

St. Louis County, Minnesota · 0.5 MI W of JCT Csah 83 · Structure no. 69541

Built
1986
39 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
254 ft
3 main spans
Daily traffic
90
2015 count
Owner
County
County Highway Agency

About this bridge

Csah 52 over ST Louis River is a prestressed concrete stringer/multi-beam or girder carrying Csah 52 over ST Louis River in St. Louis County, Minnesota. It was built in 1986, so it is 39 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 90 vehicles a day, projected to reach 90 by 2039. The structure is 254 ft (77.3 m) long and 35 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCsah 52
CrossesST Louis River
Location0.5 MI W of JCT Csah 83
RouteCounty Highway 52
Coordinates47.16703, -92.77982
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.4 US tons
Inventory rating30.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length254 ft (77.3 m)
Longest span83 ft (25.4 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2015)
Projected traffic90 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 52 over ST Louis River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Csah 52 over ST Louis 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 September 2024.

How much traffic does Csah 52 over ST Louis River carry?

About 90 vehicles per day (2015 count).

How long is Csah 52 over ST Louis River?

The structure is 254 ft (77.3 m) long with a longest span of 83 ft (25.4 m) and a deck 35 ft wide.

Who owns Csah 52 over ST Louis River?

It is owned by the County Highway Agency.