US Bridges

T 64 over Ripple River

Poor

Aitkin County, Minnesota · 1.0 MI W;s of JCT CR 51 · Structure no. 95197

Built
1979
46 years old
Condition
Poor
inspected October 2024
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
8
1986 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T 64 over Ripple River is a steel culvert carrying T 64 over Ripple River in Aitkin County, Minnesota. It was built in 1979, so it is 46 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 8 vehicles a day, projected to reach 8 by 2029. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 123 mi (198 km).

Location

Open in Google Maps
CarriesT 64
CrossesRipple River
Location1.0 MI W;s of JCT CR 51
RouteCounty Highway 64
CountyAitkin County
StateMinnesota
Coordinates46.39192, -93.66916
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43.2 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8 (1986)
Projected traffic8 by 2029
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123 mi (198 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 64 over Ripple River built?

It was built in 1979, making it 46 years old in 2025.

What condition is T 64 over Ripple River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does T 64 over Ripple River carry?

About 8 vehicles per day (1986 count).

How long is T 64 over Ripple River?

The structure is 25 ft (7.6 m) long with a longest span of 11 ft (3.4 m).

Who owns T 64 over Ripple River?

It is owned by the Town or Township Highway Agency.