US Bridges

Dewey Road over Maple River

FairPosted for load

Shiawassee County, Michigan · 3 MI W & 2 MI S of Owosso · Structure no. 000000000009858

Built
1980
45 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
249
2016 count
Owner
County
County Highway Agency

About this bridge

Dewey Road over Maple River is a prestressed concrete box beam or girders - multiple carrying Dewey Road over Maple River in Shiawassee County, Michigan. It was built in 1980, so it is 45 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. Its operating status is: posted for load restriction.

It carries about 249 vehicles a day, roughly 5% of them trucks, projected to reach 371 by 2036. The structure is 56 ft (17.1 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDewey Road
CrossesMaple River
Location3 MI W & 2 MI S of Owosso
Coordinates42.97009, -84.23754
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating34.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span52 ft (15.8 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic249 (2016)
Projected traffic371 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dewey Road over Maple River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Dewey Road over Maple 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 May 2024.

How much traffic does Dewey Road over Maple River carry?

About 249 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Dewey Road over Maple River?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.8 m) and a deck 31 ft wide.

Who owns Dewey Road over Maple River?

It is owned by the County Highway Agency.