US Bridges

CR 68 over Big Cobb River

Good

Freeborn County, Minnesota · 1.2 MI E of County Line · Structure no. 24J21

Built
2002
23 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
30
2013 count
Owner
County
County Highway Agency

About this bridge

CR 68 over Big Cobb River is a concrete culvert carrying CR 68 over Big Cobb River in Freeborn County, Minnesota. It was built in 2002, so it is 23 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 30 vehicles a day, projected to reach 30 by 2039. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCR 68
CrossesBig Cobb River
Location1.2 MI E of County Line
RouteCounty Highway 68
Coordinates43.78235, -93.62319
Functional classRural Local

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 inspectionDecember 2023
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 alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span18 ft (5.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2013)
Projected traffic30 by 2039
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

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 68 over Big Cobb River built?

It was built in 2002, making it 23 years old in 2025.

What condition is CR 68 over Big Cobb 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 December 2023.

How much traffic does CR 68 over Big Cobb River carry?

About 30 vehicles per day (2013 count).

How long is CR 68 over Big Cobb River?

The structure is 21 ft (6.3 m) long with a longest span of 18 ft (5.5 m).

Who owns CR 68 over Big Cobb River?

It is owned by the County Highway Agency.