US Bridges

Round Lake RD FH78 over Sturgeon River

Good

Alger County, Michigan · 2 MI E of W Br Lake RD · Structure no. 000000000000064

Built
2001
24 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
35 ft
2 main spans
Daily traffic
191
1998 count
Owner
County
County Highway Agency

About this bridge

Round Lake RD FH78 over Sturgeon River is a wood or timber stringer/multi-beam or girder carrying Round Lake RD FH78 over Sturgeon River in Alger County, Michigan. It was built in 2001, so it is 24 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 191 vehicles a day, projected to reach 240 by 2019. The structure is 35 ft (10.6 m) long and 26 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesRound Lake RD FH78
CrossesSturgeon River
Location2 MI E of W Br Lake RD
RouteCounty Highway 0
Coordinates46.1617, -86.69472
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating95.7 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 25 or greater
Structure length35 ft (10.6 m)
Longest span17 ft (5.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic191 (1998)
Projected traffic240 by 2019
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Round Lake RD FH78 over Sturgeon River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Round Lake RD FH78 over Sturgeon 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 2023.

How much traffic does Round Lake RD FH78 over Sturgeon River carry?

About 191 vehicles per day (1998 count).

How long is Round Lake RD FH78 over Sturgeon River?

The structure is 35 ft (10.6 m) long with a longest span of 17 ft (5.3 m) and a deck 26 ft wide.

Who owns Round Lake RD FH78 over Sturgeon River?

It is owned by the County Highway Agency.