US Bridges

Landon Road over N Br Pere Marquette Rivr

Fair

Mason County, Michigan · 0.8 MI South of US-10 · Structure no. 000000000006668

Built
1979
46 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
400
1997 count
Owner
County
County Highway Agency

About this bridge

Landon Road over N Br Pere Marquette Rivr is a prestressed concrete box beam or girders - multiple carrying Landon Road over N Br Pere Marquette Rivr in Mason 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 400 vehicles a day, roughly 8% of them trucks, projected to reach 500 by 2017. The structure is 76 ft (23.1 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLandon Road
CrossesN Br Pere Marquette Rivr
Location0.8 MI South of US-10
RouteCounty Highway 0
CountyMason County
StateMichigan
Coordinates43.93539, -86.05051
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length76 ft (23.1 m)
Longest span76 ft (23.1 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1997)
Projected traffic500 by 2017
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Landon Road over N Br Pere Marquette Rivr built?

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

What condition is Landon Road over N 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 Landon Road over N Br Pere Marquette Rivr carry?

About 400 vehicles per day (1997 count), of which roughly 8% are trucks.

How long is Landon Road over N Br Pere Marquette Rivr?

The structure is 76 ft (23.1 m) long with a longest span of 76 ft (23.1 m) and a deck 31 ft wide.

Who owns Landon Road over N Br Pere Marquette Rivr?

It is owned by the County Highway Agency.