US Bridges

Arrowhead Cr. RD over Little Isabella River

Good

Lake County, Minnesota · 1.1 MI N of JCT TH 1 · Structure no. 090907000001017

Built
1998
27 years old
Condition
Good
inspected August 2024
Type
Culvert
Steel
Length
25 ft
3 main spans
Daily traffic
5
1973 count
Owner
Federal
U.S. Forest Service

About this bridge

Arrowhead Cr. RD over Little Isabella River is a steel culvert carrying Arrowhead Cr. RD over Little Isabella River in Lake County, Minnesota. It was built in 1998, so it is 27 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 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 5 vehicles a day, projected to reach 7 by 2045. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 620.7 mi (999 km).

CarriesArrowhead Cr. RD
CrossesLittle Isabella River
Location1.1 MI N of JCT TH 1
RouteFederal Lands Road 176
Coordinates47.63417, -91.38361
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating89.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (1973)
Projected traffic7 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 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 Arrowhead Cr. RD over Little Isabella River built?

It was built in 1998, making it 27 years old in 2025.

What condition is Arrowhead Cr. RD over Little Isabella 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 Arrowhead Cr. RD over Little Isabella River carry?

About 5 vehicles per day (1973 count).

How long is Arrowhead Cr. RD over Little Isabella River?

The structure is 25 ft (7.6 m) long with a longest span of 6 ft (1.8 m).

Who owns Arrowhead Cr. RD over Little Isabella River?

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