US Bridges

T 491 over Midway River

Fair

Carlton County, Minnesota · 0.1 MI W of E CO Line · Structure no. 09516

Built
1993
32 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
99
1993 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 491 over Midway River is a prestressed concrete tee beam carrying T 491 over Midway River in Carlton County, Minnesota. It was built in 1993, so it is 32 years old, younger 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 99 vehicles a day, projected to reach 99 by 2029. The structure is 112 ft (34.1 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesT 491
CrossesMidway River
Location0.1 MI W of E CO Line
RouteCounty Highway 491
Coordinates46.74977, -92.30226
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.2 US tons
Inventory rating49.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span37 ft (11.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99 (1993)
Projected traffic99 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 491 over Midway River built?

It was built in 1993, making it 32 years old in 2025.

What condition is T 491 over Midway 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 October 2023.

How much traffic does T 491 over Midway River carry?

About 99 vehicles per day (1993 count).

How long is T 491 over Midway River?

The structure is 112 ft (34.1 m) long with a longest span of 37 ft (11.4 m) and a deck 35 ft wide.

Who owns T 491 over Midway River?

It is owned by the Town or Township Highway Agency.