US Bridges

T 350 over Long Prairie River

Good

Todd County, Minnesota · 0.1 MI E of JCT CR 79 · Structure no. 77533

Built
1996
29 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
178 ft
3 main spans
Daily traffic
29
1970 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 350 over Long Prairie River is a prestressed concrete tee beam carrying T 350 over Long Prairie River in Todd County, Minnesota. It was built in 1996, so it is 29 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 29 vehicles a day, projected to reach 29 by 2029. The structure is 178 ft (54.3 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesT 350
CrossesLong Prairie River
Location0.1 MI E of JCT CR 79
RouteCounty Highway 350
Coordinates46.20928, -94.81274
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating41.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length178 ft (54.3 m)
Longest span59 ft (18.1 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (1970)
Projected traffic29 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 350 over Long Prairie River built?

It was built in 1996, making it 29 years old in 2025.

What condition is T 350 over Long Prairie 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 October 2024.

How much traffic does T 350 over Long Prairie River carry?

About 29 vehicles per day (1970 count).

How long is T 350 over Long Prairie River?

The structure is 178 ft (54.3 m) long with a longest span of 59 ft (18.1 m) and a deck 36 ft wide.

Who owns T 350 over Long Prairie River?

It is owned by the Town or Township Highway Agency.