US Bridges

Skookum over Pine River

Good

Lake County, Michigan · 4.4 MI NE of Luther · Structure no. 000000000005284

Built
1958
67 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
105 ft
3 main spans
Daily traffic
780
2007 count
Owner
County
County Highway Agency

About this bridge

Skookum over Pine River is a prestressed concrete box beam or girders - multiple carrying Skookum over Pine River in Lake County, Michigan. It was built in 1958, so it is 67 years old, older 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 780 vehicles a day, projected to reach 1,400 by 2025. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSkookum
CrossesPine River
Location4.4 MI NE of Luther
RouteCounty Highway 4379
Coordinates44.07922, -85.64298
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 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 rating78.2 US tons
Inventory rating46.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length105 ft (32 m)
Longest span35 ft (10.6 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic780 (2007)
Projected traffic1,400 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Skookum over Pine River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Skookum over Pine 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 May 2023.

How much traffic does Skookum over Pine River carry?

About 780 vehicles per day (2007 count).

How long is Skookum over Pine River?

The structure is 105 ft (32 m) long with a longest span of 35 ft (10.6 m) and a deck 31 ft wide.

Who owns Skookum over Pine River?

It is owned by the County Highway Agency.