US Bridges

FR2171 over Third River

Good

Itasca County, Minnesota · 12.1 MI W of JCT TH 46 · Structure no. 090301000001014

Built
1986
39 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
25
1990 count
Owner
Federal
U.S. Forest Service

About this bridge

FR2171 over Third River is a prestressed concrete stringer/multi-beam or girder carrying FR2171 over Third River in Itasca County, Minnesota. It was built in 1986, so it is 39 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 25 vehicles a day, projected to reach 37 by 2045. The structure is 56 ft (17.1 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFR2171
CrossesThird River
Location12.1 MI W of JCT TH 46
RouteFederal Lands Road 2171
Coordinates47.53913, -94.2612
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating65 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length56 ft (17.1 m)
Longest span56 ft (17.1 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (1990)
Projected traffic37 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FR2171 over Third River built?

It was built in 1986, making it 39 years old in 2025.

What condition is FR2171 over Third 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 March 2024.

How much traffic does FR2171 over Third River carry?

About 25 vehicles per day (1990 count).

How long is FR2171 over Third River?

The structure is 56 ft (17.1 m) long with a longest span of 56 ft (17.1 m) and a deck 24 ft wide.

Who owns FR2171 over Third River?

It is owned by the U.S. Forest Service.