US Bridges

Forest Road 6930 over Sisson Lilley Creek

Good

Gogebic County, Michigan · 5.5 MI S of Matchwood · Structure no. 090701000001017

Built
2003
22 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 6930 over Sisson Lilley Creek is a prestressed concrete box beam or girders - multiple carrying Forest Road 6930 over Sisson Lilley Creek in Gogebic County, Michigan. It was built in 2003, so it is 22 years old, younger than the Michigan average of 48.3 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 44 ft (13.5 m) long and 25 ft wide. If it were closed, the detour would be 32.3 mi (52 km).

Location

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CarriesForest Road 6930
CrossesSisson Lilley Creek
Location5.5 MI S of Matchwood
RouteFederal Lands Road 6930
CountyGogebic County
StateMichigan
Coordinates46.47501, -89.40801
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length44 ft (13.5 m)
Longest span41 ft (12.6 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed32.3 mi (52 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 Forest Road 6930 over Sisson Lilley Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Forest Road 6930 over Sisson Lilley Creek 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 Forest Road 6930 over Sisson Lilley Creek carry?

About 50 vehicles per day (latest count).

How long is Forest Road 6930 over Sisson Lilley Creek?

The structure is 44 ft (13.5 m) long with a longest span of 41 ft (12.6 m) and a deck 25 ft wide.

Who owns Forest Road 6930 over Sisson Lilley Creek?

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