US Bridges

T 12 over S Br Root River

Fair

Mower County, Minnesota · 2.5 MI E of JCT Csah 14 · Structure no. 50569

Built
1993
32 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
117 ft
3 main spans
Daily traffic
37
1986 count
Owner
County
County Highway Agency

About this bridge

T 12 over S Br Root River is a concrete continuous slab carrying T 12 over S Br Root River in Mower 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 37 vehicles a day, projected to reach 37 by 2029. The structure is 117 ft (35.8 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesT 12
CrossesS Br Root River
Location2.5 MI E of JCT Csah 14
RouteCounty Highway 12
Coordinates43.64528, -92.45894
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108 US tons
Inventory rating64.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length117 ft (35.8 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (1986)
Projected traffic37 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was T 12 over S Br Root River built?

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

What condition is T 12 over S Br Root 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 July 2024.

How much traffic does T 12 over S Br Root River carry?

About 37 vehicles per day (1986 count).

How long is T 12 over S Br Root River?

The structure is 117 ft (35.8 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns T 12 over S Br Root River?

It is owned by the County Highway Agency.