US Bridges

Mn 194 over Superior ST(MSAS171)

Fair

St. Louis County, Minnesota · 0.2 MI N of JCT TH 35 · Structure no. 69840

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
300 ft
3 main spans
Daily traffic
10,892
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 194 over Superior ST(MSAS171) is a steel continuous stringer/multi-beam or girder carrying Mn 194 over Superior ST(MSAS171) in St. Louis County, Minnesota. It was built in 1968, so it is 57 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 5 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 10,892 vehicles a day, roughly 2% of them trucks, projected to reach 12,400 by 2041. The structure is 300 ft (91.3 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 194
CrossesSuperior ST(MSAS171)
Location0.2 MI N of JCT TH 35
RouteState Highway 194
CountySt. Louis County
StateMinnesota
Coordinates46.77953, -92.10792
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length300 ft (91.3 m)
Longest span118 ft (36 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,892 (2021)
Projected traffic12,400 by 2041
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$378 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 194 over Superior ST(MSAS171) built?

It was built in 1968, making it 57 years old in 2025.

What condition is Mn 194 over Superior ST(MSAS171) 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 April 2024.

How much traffic does Mn 194 over Superior ST(MSAS171) carry?

About 10,892 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Mn 194 over Superior ST(MSAS171)?

The structure is 300 ft (91.3 m) long with a longest span of 118 ft (36 m) and a deck 34 ft wide.

Who owns Mn 194 over Superior ST(MSAS171)?

It is owned by the State Highway Agency.