US Bridges

US 53 over Rat Root River

Fair

Koochiching County, Minnesota · 1.5 MI NW of Ericsburg · Structure no. 36005

Built
1976
49 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
2,833
2021 count
Owner
State
State Highway Agency

About this bridge

US 53 over Rat Root River is a prestressed concrete stringer/multi-beam or girder carrying US 53 over Rat Root River in Koochiching County, Minnesota. It was built in 1976, so it is 49 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 2,833 vehicles a day, roughly 16% of them trucks, projected to reach 2,450 by 2041. The structure is 108 ft (32.9 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 53
CrossesRat Root River
Location1.5 MI NW of Ericsburg
RouteU.S. Route 53
Coordinates48.49487, -93.35941
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating97.6 US tons
Inventory rating36.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span105 ft (32.1 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,833 (2021)
Projected traffic2,450 by 2041
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 US 53 over Rat Root River built?

It was built in 1976, making it 49 years old in 2025.

What condition is US 53 over Rat Root 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 May 2024.

How much traffic does US 53 over Rat Root River carry?

About 2,833 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is US 53 over Rat Root River?

The structure is 108 ft (32.9 m) long with a longest span of 105 ft (32.1 m) and a deck 50 ft wide.

Who owns US 53 over Rat Root River?

It is owned by the State Highway Agency.