US Bridges

T 40 over I 90

Fair

Martin County, Minnesota · 2.1 MI E of JCT TH 15 · Structure no. 46831

Built
1972
53 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
304 ft
4 main spans
Daily traffic
48
1968 count
Owner
State
State Highway Agency

About this bridge

T 40 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying T 40 over I 90 in Martin County, Minnesota. It was built in 1972, so it is 53 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 48 vehicles a day, projected to reach 48 by 2029. The structure is 304 ft (92.7 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesT 40
CrossesI 90
Location2.1 MI E of JCT TH 15
RouteCounty Highway 40
CountyMartin County
StateMinnesota
Coordinates43.67062, -94.40792
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length304 ft (92.7 m)
Longest span86 ft (26.1 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48 (1968)
Projected traffic48 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 T 40 over I 90 built?

It was built in 1972, making it 53 years old in 2025.

What condition is T 40 over I 90 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 2023.

How much traffic does T 40 over I 90 carry?

About 48 vehicles per day (1968 count).

How long is T 40 over I 90?

The structure is 304 ft (92.7 m) long with a longest span of 86 ft (26.1 m) and a deck 40 ft wide.

Who owns T 40 over I 90?

It is owned by the State Highway Agency.