US Bridges

Mn 48 over Kettle River

Fair

Pine County, Minnesota · 4.5 MI E of JCT TH 35 · Structure no. 58005

Built
1997
28 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
372 ft
4 main spans
Daily traffic
2,713
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 48 over Kettle River is a prestressed concrete stringer/multi-beam or girder carrying Mn 48 over Kettle River in Pine 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 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 2,713 vehicles a day, roughly 11% of them trucks, projected to reach 3,000 by 2042. The structure is 372 ft (113.5 m) long and 47 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesMn 48
CrossesKettle River
Location4.5 MI E of JCT TH 35
RouteState Highway 48
Coordinates46.01117, -92.8397
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
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 rating79.1 US tons
Inventory rating47.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length372 ft (113.5 m)
Longest span92 ft (28 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,713 (2022)
Projected traffic3,000 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 48 over Kettle River built?

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

What condition is Mn 48 over Kettle 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 June 2023.

How much traffic does Mn 48 over Kettle River carry?

About 2,713 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Mn 48 over Kettle River?

The structure is 372 ft (113.5 m) long with a longest span of 92 ft (28 m) and a deck 47 ft wide.

Who owns Mn 48 over Kettle River?

It is owned by the State Highway Agency.