US Bridges

Csah 110 over ST Louis River

Fair

St. Louis County, Minnesota · 0.6 MI S of JCT CR569 · Structure no. 69586

Built
1989
36 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
320
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 110 over ST Louis River is a prestressed concrete tee beam carrying Csah 110 over ST Louis River in St. Louis County, Minnesota. It was built in 1989, so it is 36 years old, younger 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 320 vehicles a day, projected to reach 240 by 2039. The structure is 77 ft (23.5 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCsah 110
CrossesST Louis River
Location0.6 MI S of JCT CR569
RouteCounty Highway 110
CountySt. Louis County
StateMinnesota
Coordinates47.48112, -92.03986
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span76 ft (23.1 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2019)
Projected traffic240 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 110 over ST Louis River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Csah 110 over ST Louis 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 May 2024.

How much traffic does Csah 110 over ST Louis River carry?

About 320 vehicles per day (2019 count).

How long is Csah 110 over ST Louis River?

The structure is 77 ft (23.5 m) long with a longest span of 76 ft (23.1 m) and a deck 42 ft wide.

Who owns Csah 110 over ST Louis River?

It is owned by the County Highway Agency.