US Bridges

Mn 68 over Little Cottonwood River

Fair

Blue Earth County, Minnesota · 5.0 MI E of E JCT TH 15 · Structure no. 07045

Built
1996
29 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
175 ft
2 main spans
Daily traffic
2,800
2016 count
Owner
State
State Highway Agency

About this bridge

Mn 68 over Little Cottonwood River is a prestressed concrete stringer/multi-beam or girder carrying Mn 68 over Little Cottonwood River in Blue Earth County, Minnesota. It was built in 1996, so it is 29 years old, younger 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 5 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 2,800 vehicles a day, roughly 6% of them trucks, projected to reach 2,800 by 2036. The structure is 175 ft (53.2 m) long and 47 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesMn 68
CrossesLittle Cottonwood River
Location5.0 MI E of E JCT TH 15
RouteState Highway 68
Coordinates44.24654, -94.33913
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.3 US tons
Inventory rating46.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length175 ft (53.2 m)
Longest span85 ft (25.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2016)
Projected traffic2,800 by 2036
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mn 68 over Little Cottonwood River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Mn 68 over Little Cottonwood 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 April 2024.

How much traffic does Mn 68 over Little Cottonwood River carry?

About 2,800 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is Mn 68 over Little Cottonwood River?

The structure is 175 ft (53.2 m) long with a longest span of 85 ft (25.9 m) and a deck 47 ft wide.

Who owns Mn 68 over Little Cottonwood River?

It is owned by the State Highway Agency.