US Bridges

CR 140 over N Fk Grindstone River

Good

Pine County, Minnesota · 0.4 MI E of JCT Csah 17 · Structure no. 93314

Built
1978
47 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
59 ft
3 main spans
Daily traffic
283
2021 count
Owner
County
County Highway Agency

About this bridge

CR 140 over N Fk Grindstone River is a concrete culvert carrying CR 140 over N Fk Grindstone River in Pine County, Minnesota. It was built in 1978, so it is 47 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 283 vehicles a day, projected to reach 375 by 2041. The structure is 59 ft (18.1 m) long. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCR 140
CrossesN Fk Grindstone River
Location0.4 MI E of JCT Csah 17
RouteCounty Highway 140
Coordinates46.03994, -92.9841
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length59 ft (18.1 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic283 (2021)
Projected traffic375 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 140 over N Fk Grindstone River built?

It was built in 1978, making it 47 years old in 2025.

What condition is CR 140 over N Fk 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 October 2023.

How much traffic does CR 140 over N Fk Grindstone River carry?

About 283 vehicles per day (2021 count).

How long is CR 140 over N Fk Grindstone River?

The structure is 59 ft (18.1 m) long with a longest span of 13 ft (3.9 m).

Who owns CR 140 over N Fk Grindstone River?

It is owned by the County Highway Agency.