US Bridges

Greenwood Lake over Brule River

Fair

Cook County, Minnesota · 0.1 MI NE of JCT Csah 12 · Structure no. 090902000001024

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
2 main spans
Daily traffic
8
1973 count
Owner
Federal
U.S. Forest Service

About this bridge

Greenwood Lake over Brule River is a steel stringer/multi-beam or girder carrying Greenwood Lake over Brule River in Cook County, Minnesota. It was built in 1961, so it is 64 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8 vehicles a day, projected to reach 12 by 2045. The structure is 51 ft (15.4 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesGreenwood Lake
CrossesBrule River
Location0.1 MI NE of JCT Csah 12
RouteFederal Lands Road 309
CountyCook County
StateMinnesota
Coordinates47.92917, -90.30724
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length51 ft (15.4 m)
Longest span49 ft (14.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8 (1973)
Projected traffic12 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Greenwood Lake over Brule River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Greenwood Lake over Brule River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Greenwood Lake over Brule River carry?

About 8 vehicles per day (1973 count).

How long is Greenwood Lake over Brule River?

The structure is 51 ft (15.4 m) long with a longest span of 49 ft (14.9 m) and a deck 26 ft wide.

Who owns Greenwood Lake over Brule River?

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