US Bridges

T 24 over S Fk Grindstone River

FairPosted for load

Kanabec County, Minnesota · 0.5 MI W of JCT CR 84 · Structure no. 4957

Built
1930
95 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
23
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 24 over S Fk Grindstone River is a steel stringer/multi-beam or girder carrying T 24 over S Fk Grindstone River in Kanabec County, Minnesota. It was built in 1930, so it is 95 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 23 vehicles a day, projected to reach 23 by 2029. The structure is 26 ft (7.8 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesT 24
CrossesS Fk Grindstone River
Location0.5 MI W of JCT CR 84
RouteCounty Highway 24
Coordinates46.08602, -93.12917
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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span23 ft (7 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (1986)
Projected traffic23 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 24 over S Fk Grindstone River built?

It was built in 1930, making it 95 years old in 2025.

What condition is T 24 over S Fk Grindstone 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 November 2024.

How much traffic does T 24 over S Fk Grindstone River carry?

About 23 vehicles per day (1986 count).

How long is T 24 over S Fk Grindstone River?

The structure is 26 ft (7.8 m) long with a longest span of 23 ft (7 m) and a deck 20 ft wide.

Who owns T 24 over S Fk Grindstone River?

It is owned by the Town or Township Highway Agency.