US Bridges

Earhart RD over US-23

Fair

Washtenaw County, Michigan · 3.0 MI N of M-17 & US-23 · Structure no. 000000000010872

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
317 ft
4 main spans
Daily traffic
2,226
1994 count
Owner
State
State Highway Agency

About this bridge

Earhart RD over US-23 is a steel stringer/multi-beam or girder carrying Earhart RD over US-23 in Washtenaw County, Michigan. It was built in 1962, 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 2,226 vehicles a day, roughly 3% of them trucks, projected to reach 80 by 1977. The structure is 317 ft (96.6 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesEarhart RD
CrossesUS-23
Location3.0 MI N of M-17 & US-23
RouteCounty Highway 2006
CountyWashtenaw County
StateMichigan
Coordinates42.29416, -83.68258
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length317 ft (96.6 m)
Longest span109 ft (33.2 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,226 (1994)
Projected traffic80 by 1977
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Earhart RD over US-23 built?

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

What condition is Earhart RD over US-23 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 May 2023.

How much traffic does Earhart RD over US-23 carry?

About 2,226 vehicles per day (1994 count), of which roughly 3% are trucks.

How long is Earhart RD over US-23?

The structure is 317 ft (96.6 m) long with a longest span of 109 ft (33.2 m) and a deck 31 ft wide.

Who owns Earhart RD over US-23?

It is owned by the State Highway Agency.