US Bridges

M-14 EB over Ramp B US-23

Fair

Washtenaw County, Michigan · E JCT US-23 (over Ramp B) · Structure no. 000000000010912

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
284 ft
3 main spans
Daily traffic
32,000
1995 count
Owner
State
State Highway Agency

About this bridge

M-14 EB over Ramp B US-23 is a steel stringer/multi-beam or girder carrying M-14 EB over Ramp B US-23 in Washtenaw County, Michigan. It was built in 1964, so it is 61 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 32,000 vehicles a day, roughly 18% of them trucks, projected to reach 40,500 by 2015. The structure is 284 ft (86.5 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesM-14 EB
CrossesRamp B US-23
LocationE JCT US-23 (over Ramp B)
RouteState Highway 14
CountyWashtenaw County
StateMichigan
Coordinates42.32261, -83.69012
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 inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100.3 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length284 ft (86.5 m)
Longest span140 ft (42.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,000 (1995)
Projected traffic40,500 by 2015
Trucks18%
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 M-14 EB over Ramp B US-23 built?

It was built in 1964, making it 61 years old in 2025.

What condition is M-14 EB over Ramp B 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 July 2024.

How much traffic does M-14 EB over Ramp B US-23 carry?

About 32,000 vehicles per day (1995 count), of which roughly 18% are trucks.

How long is M-14 EB over Ramp B US-23?

The structure is 284 ft (86.5 m) long with a longest span of 140 ft (42.6 m) and a deck 33 ft wide.

Who owns M-14 EB over Ramp B US-23?

It is owned by the State Highway Agency.