US Bridges

Csah 39 over Ripple River

Good

Aitkin County, Minnesota · Ripple River · Structure no. 01J04

Built
1997
28 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
651
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 39 over Ripple River is a concrete culvert carrying Csah 39 over Ripple River in Aitkin County, Minnesota. It was built in 1997, so it is 28 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 651 vehicles a day, projected to reach 660 by 2042. The structure is 30 ft (9 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCsah 39
CrossesRipple River
LocationRipple River
RouteCounty Highway 39
CountyAitkin County
StateMinnesota
Coordinates46.4622, -93.69025
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length30 ft (9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic651 (2022)
Projected traffic660 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Csah 39 over Ripple River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Csah 39 over Ripple River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does Csah 39 over Ripple River carry?

About 651 vehicles per day (2022 count).

How long is Csah 39 over Ripple River?

The structure is 30 ft (9 m) long with a longest span of 10 ft (3 m).

Who owns Csah 39 over Ripple River?

It is owned by the County Highway Agency.