US Bridges

Ross Road over S. O. Drain

FairPosted for load

Tuscola County, Michigan · Sec 20-29 Wells Twp · Structure no. 000000000010661

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
8
2009 count
Owner
County
County Highway Agency

About this bridge

Ross Road over S. O. Drain is a prestressed concrete tee beam carrying Ross Road over S. O. Drain in Tuscola 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 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 8 vehicles a day, projected to reach 15 by 2029. The structure is 36 ft (10.9 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRoss Road
CrossesS. O. Drain
LocationSec 20-29 Wells Twp
RouteCounty Highway 0
CountyTuscola County
StateMichigan
Coordinates43.43937, -83.31857
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
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (10.9 m)
Longest span33 ft (10.2 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8 (2009)
Projected traffic15 by 2029
Trucks0%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$30,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ross Road over S. O. Drain built?

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

What condition is Ross Road over S. O. Drain 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 April 2023.

How much traffic does Ross Road over S. O. Drain carry?

About 8 vehicles per day (2009 count).

How long is Ross Road over S. O. Drain?

The structure is 36 ft (10.9 m) long with a longest span of 33 ft (10.2 m) and a deck 32 ft wide.

Who owns Ross Road over S. O. Drain?

It is owned by the County Highway Agency.