US Bridges

T 29 over Stony Creek

FairPosted for load

Clay County, Minnesota · 1.1 MI SW of JCT TH 9 · Structure no. 3863

Built
1922
103 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
40
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 29 over Stony Creek is a steel stringer/multi-beam or girder carrying T 29 over Stony Creek in Clay County, Minnesota. It was built in 1922, so it is 103 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 5 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 40 vehicles a day, projected to reach 40 by 2029. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesT 29
CrossesStony Creek
Location1.1 MI SW of JCT TH 9
RouteCounty Highway 29
CountyClay County
StateMinnesota
Coordinates46.68876, -96.43631
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.5 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span29 ft (8.9 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (1986)
Projected traffic40 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$117 million
NavigationNo navigation control on waterway

Frequently asked questions

When was T 29 over Stony Creek built?

It was built in 1922, making it 103 years old in 2025.

What condition is T 29 over Stony Creek 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 29 over Stony Creek carry?

About 40 vehicles per day (1986 count).

How long is T 29 over Stony Creek?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.9 m) and a deck 20 ft wide.

Who owns T 29 over Stony Creek?

It is owned by the Town or Township Highway Agency.