US Bridges

T 121 over Mid Fk Zumbro River

FairPosted for load

Dodge County, Minnesota · 0.1 MI S of JCT Csah 24 · Structure no. L9415

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Slab
Wood or Timber
Length
78 ft
3 main spans
Daily traffic
20
1993 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 121 over Mid Fk Zumbro River is a wood or timber slab carrying T 121 over Mid Fk Zumbro River in Dodge County, Minnesota. It was built in 1973, so it is 52 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, projected to reach 20 by 2029. The structure is 78 ft (23.9 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesT 121
CrossesMid Fk Zumbro River
Location0.1 MI S of JCT Csah 24
RouteCounty Highway 121
Coordinates44.18093, -92.68709
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.3 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length78 ft (23.9 m)
Longest span26 ft (7.9 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1993)
Projected traffic20 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 121 over Mid Fk Zumbro River built?

It was built in 1973, making it 52 years old in 2025.

What condition is T 121 over Mid Fk Zumbro 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 September 2023.

How much traffic does T 121 over Mid Fk Zumbro River carry?

About 20 vehicles per day (1993 count).

How long is T 121 over Mid Fk Zumbro River?

The structure is 78 ft (23.9 m) long with a longest span of 26 ft (7.9 m) and a deck 22 ft wide.

Who owns T 121 over Mid Fk Zumbro River?

It is owned by the Town or Township Highway Agency.