US Bridges

Mn 33 over ST Louis River

Fair

Carlton County, Minnesota · 2.8 MI N of JCT TH 35 · Structure no. 09008

Built
1995
30 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
528 ft
4 main spans
Daily traffic
13,800
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 33 over ST Louis River is a prestressed concrete stringer/multi-beam or girder carrying Mn 33 over ST Louis River in Carlton County, Minnesota. It was built in 1995, so it is 30 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 13,800 vehicles a day, roughly 4% of them trucks, projected to reach 14,200 by 2038. The structure is 528 ft (160.8 m) long and 96 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesMn 33
CrossesST Louis River
Location2.8 MI N of JCT TH 35
RouteState Highway 33
CountyCarlton County
StateMinnesota
Coordinates46.7279, -92.46381
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length528 ft (160.8 m)
Longest span133 ft (40.4 m)
Deck width96 ft (29.2 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,800 (2018)
Projected traffic14,200 by 2038
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mn 33 over ST Louis River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Mn 33 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 June 2023.

How much traffic does Mn 33 over ST Louis River carry?

About 13,800 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Mn 33 over ST Louis River?

The structure is 528 ft (160.8 m) long with a longest span of 133 ft (40.4 m) and a deck 96 ft wide.

Who owns Mn 33 over ST Louis River?

It is owned by the State Highway Agency.