US Bridges

T 146 over Ditch

PoorPosted for load

Mower County, Minnesota · 0.1 MI N of JCT TH 251 · Structure no. L5091

Built
1923
102 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
20 ft
1 main span
Daily traffic
23
1986 count
Owner
County
County Highway Agency

About this bridge

T 146 over Ditch is a steel stringer/multi-beam or girder carrying T 146 over Ditch in Mower County, Minnesota. It was built in 1923, so it is 102 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 23 vehicles a day, projected to reach 23 by 2029. The structure is 20 ft (6.2 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesT 146
CrossesDitch
Location0.1 MI N of JCT TH 251
RouteCounty Highway 146
CountyMower County
StateMinnesota
Coordinates43.76288, -92.99976
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating14.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length20 ft (6.2 m)
Longest span16 ft (5 m)
Deck width25 ft (7.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (1986)
Projected traffic23 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$224.4 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was T 146 over Ditch built?

It was built in 1923, making it 102 years old in 2025.

What condition is T 146 over Ditch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does T 146 over Ditch carry?

About 23 vehicles per day (1986 count).

How long is T 146 over Ditch?

The structure is 20 ft (6.2 m) long with a longest span of 16 ft (5 m) and a deck 25 ft wide.

Who owns T 146 over Ditch?

It is owned by the County Highway Agency.