US Bridges

Mn 73 over West Swan River

Good

St. Louis County, Minnesota · 8.3 MI S of S JCT TH 169 · Structure no. 69138

Built
2023
2 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
1,300
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 73 over West Swan River is a prestressed concrete stringer/multi-beam or girder carrying Mn 73 over West Swan River in St. Louis County, Minnesota. It was built in 2023, so it is 2 years old, younger 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 1,300 vehicles a day, roughly 3% of them trucks, projected to reach 1,900 by 2039. The structure is 75 ft (22.9 m) long and 47 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesMn 73
CrossesWest Swan River
Location8.3 MI S of S JCT TH 169
RouteState Highway 73
CountySt. Louis County
StateMinnesota
Coordinates47.29117, -93.02308
Functional classRural Minor Arterial

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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span73 ft (22.3 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2019)
Projected traffic1,900 by 2039
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 73 over West Swan River built?

It was built in 2023, making it 2 years old in 2025.

What condition is Mn 73 over West Swan 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 August 2023.

How much traffic does Mn 73 over West Swan River carry?

About 1,300 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Mn 73 over West Swan River?

The structure is 75 ft (22.9 m) long with a longest span of 73 ft (22.3 m) and a deck 47 ft wide.

Who owns Mn 73 over West Swan River?

It is owned by the State Highway Agency.