US Bridges

Sturgeon River RD over Sturgeon River

Fair

Houghton County, Michigan · 2.0 MI So of Chassell · Structure no. 000000000003418

Built
1979
46 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
25
2015 count
Owner
County
County Highway Agency

About this bridge

Sturgeon River RD over Sturgeon River is a prestressed concrete box beam or girders - multiple carrying Sturgeon River RD over Sturgeon River in Houghton County, Michigan. It was built in 1979, so it is 46 years old, younger than the Michigan average of 48.3 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 25 vehicles a day, roughly 1% of them trucks, projected to reach 45 by 2035. The structure is 180 ft (54.9 m) long and 31 ft wide. If it were closed, the detour would be 124.9 mi (201 km).

CarriesSturgeon River RD
CrossesSturgeon River
Location2.0 MI So of Chassell
RouteCounty Highway 3155
Coordinates46.99749, -88.50876
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length180 ft (54.9 m)
Longest span60 ft (18.3 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2015)
Projected traffic45 by 2035
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.9 mi (201 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 Sturgeon River RD over Sturgeon River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Sturgeon River RD over Sturgeon 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 2023.

How much traffic does Sturgeon River RD over Sturgeon River carry?

About 25 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Sturgeon River RD over Sturgeon River?

The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 31 ft wide.

Who owns Sturgeon River RD over Sturgeon River?

It is owned by the County Highway Agency.