US Bridges

Mn 194 over Unstable Material

Fair

St. Louis County, Minnesota · 0.3 MI N of Garfield Ave · Structure no. 69887A

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
494 ft
7 main spans
Daily traffic
7,500
2015 count
Owner
State
State Highway Agency

About this bridge

Mn 194 over Unstable Material is a prestressed concrete stringer/multi-beam or girder carrying Mn 194 over Unstable Material in St. Louis County, Minnesota. It was built in 1970, so it is 55 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 7,500 vehicles a day, roughly 2% of them trucks, projected to reach 7,500 by 2039. The structure is 494 ft (150.7 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 194
CrossesUnstable Material
Location0.3 MI N of Garfield Ave
RouteState Highway 194
CountySt. Louis County
StateMinnesota
Coordinates46.77573, -92.11018
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating35.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7 (+5 approach)
Design loadHS 20
Structure length494 ft (150.7 m)
Longest span48 ft (14.6 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck19 ft (5.7 m)

Traffic and service

Average daily traffic7,500 (2015)
Projected traffic7,500 by 2039
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 194 over Unstable Material built?

It was built in 1970, making it 55 years old in 2025.

What condition is Mn 194 over Unstable Material 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 October 2024.

How much traffic does Mn 194 over Unstable Material carry?

About 7,500 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Mn 194 over Unstable Material?

The structure is 494 ft (150.7 m) long with a longest span of 48 ft (14.6 m) and a deck 32 ft wide.

Who owns Mn 194 over Unstable Material?

It is owned by the State Highway Agency.