US Bridges

Mn 55 over Chippewa River

Good

Grant County, Minnesota · 2.0 MI SE of Hoffman · Structure no. 26002

Built
2010
15 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
830
2017 count
Owner
State
State Highway Agency

About this bridge

Mn 55 over Chippewa River is a prestressed concrete stringer/multi-beam or girder carrying Mn 55 over Chippewa River in Grant County, Minnesota. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 830 vehicles a day, roughly 13% of them trucks, projected to reach 830 by 2037. The structure is 71 ft (21.5 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMn 55
CrossesChippewa River
Location2.0 MI SE of Hoffman
RouteState Highway 55
Coordinates45.81004, -95.7636
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81.1 US tons
Inventory rating49.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length71 ft (21.5 m)
Longest span69 ft (20.9 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic830 (2017)
Projected traffic830 by 2037
Trucks13%
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

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 55 over Chippewa River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Mn 55 over Chippewa 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 August 2024.

How much traffic does Mn 55 over Chippewa River carry?

About 830 vehicles per day (2017 count), of which roughly 13% are trucks.

How long is Mn 55 over Chippewa River?

The structure is 71 ft (21.5 m) long with a longest span of 69 ft (20.9 m) and a deck 39 ft wide.

Who owns Mn 55 over Chippewa River?

It is owned by the State Highway Agency.