US Bridges

US23 Br N to US23N over US-23 Sb(ramp C)

Fair

Washtenaw County, Michigan · @ W JCT US-23 (top Levl) · Structure no. 000000000010917

Built
1962
63 years old, rebuilt 1998
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
298 ft
3 main spans
Daily traffic
36,627
2007 count
Owner
State
State Highway Agency

About this bridge

US23 Br N to US23N over US-23 Sb(ramp C) is a steel stringer/multi-beam or girder carrying US23 Br N to US23N over US-23 Sb(ramp C) in Washtenaw County, Michigan. It was built in 1962 and reconstructed in 1998, so it is 63 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 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 36,627 vehicles a day, roughly 11% of them trucks, projected to reach 41,388 by 2018. The structure is 298 ft (90.8 m) long and 37 ft wide.

Location

Open in Google Maps
CarriesUS23 Br N to US23N
CrossesUS-23 Sb(ramp C)
Location@ W JCT US-23 (top Levl)
RouteU.S. Route 23
CountyWashtenaw County
StateMichigan
Coordinates42.32022, -83.73949
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length298 ft (90.8 m)
Longest span150 ft (45.7 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,627 (2007)
Projected traffic41,388 by 2018
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US23 Br N to US23N over US-23 Sb(ramp C) built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1998.

What condition is US23 Br N to US23N over US-23 Sb(ramp C) 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 June 2024.

How much traffic does US23 Br N to US23N over US-23 Sb(ramp C) carry?

About 36,627 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is US23 Br N to US23N over US-23 Sb(ramp C)?

The structure is 298 ft (90.8 m) long with a longest span of 150 ft (45.7 m) and a deck 37 ft wide.

Who owns US23 Br N to US23N over US-23 Sb(ramp C)?

It is owned by the State Highway Agency.