US Bridges

T 340 over Big Cottonwood River

Good

Lyon County, Minnesota · 0.3 MI NE of JCT TH 59 · Structure no. 42J26

Built
2008
17 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
49 ft
3 main spans
Daily traffic
30
2007 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 340 over Big Cottonwood River is a concrete culvert carrying T 340 over Big Cottonwood River in Lyon County, Minnesota. It was built in 2008, so it is 17 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, projected to reach 30 by 2029. The structure is 49 ft (14.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesT 340
CrossesBig Cottonwood River
Location0.3 MI NE of JCT TH 59
RouteCounty Highway 340
Coordinates44.26649, -95.74691
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length49 ft (14.8 m)
Longest span14 ft (4.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2007)
Projected traffic30 by 2029
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 340 over Big Cottonwood River built?

It was built in 2008, making it 17 years old in 2025.

What condition is T 340 over Big Cottonwood 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 2023.

How much traffic does T 340 over Big Cottonwood River carry?

About 30 vehicles per day (2007 count).

How long is T 340 over Big Cottonwood River?

The structure is 49 ft (14.8 m) long with a longest span of 14 ft (4.4 m).

Who owns T 340 over Big Cottonwood River?

It is owned by the Town or Township Highway Agency.