US Bridges

T 146 over Le Sueur River

Fair

Waseca County, Minnesota · 1.0 MI S of JCT Csah 20 · Structure no. 81520

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
48
1969 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 146 over Le Sueur River is a prestressed concrete tee beam carrying T 146 over Le Sueur River in Waseca County, Minnesota. It was built in 1979, so it is 46 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 48 vehicles a day, projected to reach 48 by 2029. The structure is 135 ft (41.1 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesT 146
CrossesLe Sueur River
Location1.0 MI S of JCT Csah 20
RouteCounty Highway 146
Coordinates43.94242, -93.52662
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating92.5 US tons
Inventory rating55.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span45 ft (13.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (1969)
Projected traffic48 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 T 146 over Le Sueur River built?

It was built in 1979, making it 46 years old in 2025.

What condition is T 146 over Le Sueur 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 November 2023.

How much traffic does T 146 over Le Sueur River carry?

About 48 vehicles per day (1969 count).

How long is T 146 over Le Sueur River?

The structure is 135 ft (41.1 m) long with a longest span of 45 ft (13.6 m) and a deck 32 ft wide.

Who owns T 146 over Le Sueur River?

It is owned by the Town or Township Highway Agency.