US Bridges

I 35 over Grindstone River

Good

Pine County, Minnesota · 0.3 MI N of JCT TH 48 · Structure no. 58828

Built
2024
1 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
8,150
2016 count
Owner
State
State Highway Agency

About this bridge

I 35 over Grindstone River is a prestressed concrete stringer/multi-beam or girder carrying I 35 over Grindstone River in Pine County, Minnesota. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,150 vehicles a day, roughly 8% of them trucks, projected to reach 9,250 by 2043. The structure is 104 ft (31.7 m) long and 46 ft wide. If it were closed, the detour would be 44.1 mi (71 km).

Location

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CarriesI 35
CrossesGrindstone River
Location0.3 MI N of JCT TH 48
RouteInterstate 35
CountyPine County
StateMinnesota
Coordinates46.01549, -92.92959
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length104 ft (31.7 m)
Longest span102 ft (31 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,150 (2016)
Projected traffic9,250 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.1 mi (71 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 35 over Grindstone River built?

It was built in 2024, making it 1 years old in 2025.

What condition is I 35 over Grindstone 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 I 35 over Grindstone River carry?

About 8,150 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is I 35 over Grindstone River?

The structure is 104 ft (31.7 m) long with a longest span of 102 ft (31 m) and a deck 46 ft wide.

Who owns I 35 over Grindstone River?

It is owned by the State Highway Agency.