US Bridges

Lake 29 East Road over Dumbbell River

Good

Lake County, Minnesota · 13.7 MI NE of JCT TH 1 · Structure no. 090907000001027

Built
1959
66 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
4
1973 count
Owner
Federal
U.S. Forest Service

About this bridge

Lake 29 East Road over Dumbbell River is a steel stringer/multi-beam or girder carrying Lake 29 East Road over Dumbbell River in Lake County, Minnesota. It was built in 1959, so it is 66 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 4 vehicles a day, projected to reach 6 by 2045. The structure is 40 ft (12.3 m) long and 24 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesLake 29 East Road
CrossesDumbbell River
Location13.7 MI NE of JCT TH 1
RouteFederal Lands Road 356
Coordinates47.74943, -91.21347
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span39 ft (11.9 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4 (1973)
Projected traffic6 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 Lake 29 East Road over Dumbbell River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Lake 29 East Road over Dumbbell 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 September 2021.

How much traffic does Lake 29 East Road over Dumbbell River carry?

About 4 vehicles per day (1973 count).

How long is Lake 29 East Road over Dumbbell River?

The structure is 40 ft (12.3 m) long with a longest span of 39 ft (11.9 m) and a deck 24 ft wide.

Who owns Lake 29 East Road over Dumbbell River?

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