US Bridges

Evans Road over Au Sable River

Fair

Oscoda County, Michigan · Sec 15 Mentor Twp · Structure no. 000000000008663

Built
1981
44 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
3 main spans
Daily traffic
309
2018 count
Owner
County
County Highway Agency

About this bridge

Evans Road over Au Sable River is a steel continuous stringer/multi-beam or girder carrying Evans Road over Au Sable River in Oscoda County, Michigan. It was built in 1981, so it is 44 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 309 vehicles a day, roughly 10% of them trucks, projected to reach 380 by 2038. The structure is 212 ft (64.6 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesEvans Road
CrossesAu Sable River
LocationSec 15 Mentor Twp
RouteCounty Highway 6840
CountyOscoda County
StateMichigan
Coordinates44.64345, -83.94061
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating80.4 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span76 ft (23.2 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic309 (2018)
Projected traffic380 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Evans Road over Au Sable River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Evans Road over Au Sable 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 Evans Road over Au Sable River carry?

About 309 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Evans Road over Au Sable River?

The structure is 212 ft (64.6 m) long with a longest span of 76 ft (23.2 m) and a deck 36 ft wide.

Who owns Evans Road over Au Sable River?

It is owned by the County Highway Agency.