US Bridges

Walhalla Road over S Br Pere Marquette Rivr

Fair

Mason County, Michigan · 5.5 MI S of US-10 · Structure no. 000000000006656

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
105 ft
3 main spans
Daily traffic
701
2020 count
Owner
County
County Highway Agency

About this bridge

Walhalla Road over S Br Pere Marquette Rivr is a prestressed concrete box beam or girders - multiple carrying Walhalla Road over S Br Pere Marquette Rivr in Mason County, Michigan. It was built in 1978, so it is 47 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 5 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 701 vehicles a day, roughly 10% of them trucks, projected to reach 855 by 2040. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesWalhalla Road
CrossesS Br Pere Marquette Rivr
Location5.5 MI S of US-10
RouteCounty Highway 5320
CountyMason County
StateMichigan
Coordinates43.87581, -86.11379
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length105 ft (32 m)
Longest span35 ft (10.6 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic701 (2020)
Projected traffic855 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Walhalla Road over S Br Pere Marquette Rivr built?

It was built in 1978, making it 47 years old in 2025.

What condition is Walhalla Road over S Br Pere Marquette Rivr 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 August 2024.

How much traffic does Walhalla Road over S Br Pere Marquette Rivr carry?

About 701 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Walhalla Road over S Br Pere Marquette Rivr?

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 Walhalla Road over S Br Pere Marquette Rivr?

It is owned by the County Highway Agency.