US Bridges

US-23 SB over Barker RD

Fair

Washtenaw County, Michigan · 0.7 MI S of CO Line · Structure no. 000000000010884

Built
1958
67 years old, rebuilt 2006
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
141 ft
3 main spans
Daily traffic
33,375
2017 count
Owner
State
State Highway Agency

About this bridge

US-23 SB over Barker RD is a concrete continuous tee beam carrying US-23 SB over Barker RD in Washtenaw County, Michigan. It was built in 1958 and reconstructed in 2006, so it is 67 years old, older 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 33,375 vehicles a day, roughly 8% of them trucks, projected to reach 35,575 by 2037. The structure is 141 ft (43 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-23 SB
CrossesBarker RD
Location0.7 MI S of CO Line
RouteU.S. Route 23
Coordinates42.42253, -83.76842
Functional classRural Principal Arterial - Other

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span56 ft (17.2 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,375 (2017)
Projected traffic35,575 by 2037
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-23 SB over Barker RD built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2006.

What condition is US-23 SB over Barker RD 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 US-23 SB over Barker RD carry?

About 33,375 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is US-23 SB over Barker RD?

The structure is 141 ft (43 m) long with a longest span of 56 ft (17.2 m) and a deck 60 ft wide.

Who owns US-23 SB over Barker RD?

It is owned by the State Highway Agency.