US Bridges

US-23 NB over I-94

Fair

Washtenaw County, Michigan · @ US-23 · Structure no. 000000000010838

Built
1962
63 years old, rebuilt 2005
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
253 ft
5 main spans
Daily traffic
27,274
2007 count
Owner
State
State Highway Agency

About this bridge

US-23 NB over I-94 is a steel stringer/multi-beam or girder carrying US-23 NB over I-94 in Washtenaw County, Michigan. It was built in 1962 and reconstructed in 2005, 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 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 27,274 vehicles a day, roughly 11% of them trucks, projected to reach 33,385 by 2018. The structure is 253 ft (77.1 m) long and 85 ft wide.

CarriesUS-23 NB
CrossesI-94
Location@ US-23
RouteU.S. Route 23
Coordinates42.22554, -83.68507
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.
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 inspectionJune 2024
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 alignment6: Equal to present minimum criteria
Operating rating78.3 US tons
Inventory rating46.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length253 ft (77.1 m)
Longest span62 ft (18.9 m)
Deck width85 ft (25.8 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,274 (2007)
Projected traffic33,385 by 2018
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 NB over I-94 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2005.

What condition is US-23 NB over I-94 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 US-23 NB over I-94 carry?

About 27,274 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is US-23 NB over I-94?

The structure is 253 ft (77.1 m) long with a longest span of 62 ft (18.9 m) and a deck 85 ft wide.

Who owns US-23 NB over I-94?

It is owned by the State Highway Agency.