US Bridges

CR 54 over Ripple River

Fair

Aitkin County, Minnesota · 0.3 MI E of JCT Csah 1 · Structure no. 01515

Built
1986
39 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
658
2022 count
Owner
County
County Highway Agency

About this bridge

CR 54 over Ripple River is a prestressed concrete tee beam carrying CR 54 over Ripple River in Aitkin County, Minnesota. It was built in 1986, so it is 39 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.

It carries about 658 vehicles a day, projected to reach 660 by 2042. The structure is 62 ft (19 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR 54
CrossesRipple River
Location0.3 MI E of JCT Csah 1
RouteCounty Highway 54
CountyAitkin County
StateMinnesota
Coordinates46.53702, -93.70073
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.2 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (19 m)
Longest span59 ft (18 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic658 (2022)
Projected traffic660 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 CR 54 over Ripple River built?

It was built in 1986, making it 39 years old in 2025.

What condition is CR 54 over Ripple 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 October 2024.

How much traffic does CR 54 over Ripple River carry?

About 658 vehicles per day (2022 count).

How long is CR 54 over Ripple River?

The structure is 62 ft (19 m) long with a longest span of 59 ft (18 m) and a deck 36 ft wide.

Who owns CR 54 over Ripple River?

It is owned by the County Highway Agency.