US Bridges

M-14 EB over Maple RD

Fair

Washtenaw County, Michigan · 1.6 MI NE of I-94 · Structure no. 000000000010952

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
141 ft
3 main spans
Daily traffic
19,982
2014 count
Owner
State
State Highway Agency

About this bridge

M-14 EB over Maple RD is a prestressed concrete stringer/multi-beam or girder carrying M-14 EB over Maple RD in Washtenaw County, Michigan. It was built in 1966, so it is 59 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 19,982 vehicles a day, roughly 9% of them trucks, projected to reach 22,979 by 2034. The structure is 141 ft (43.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-14 EB
CrossesMaple RD
Location1.6 MI NE of I-94
RouteState Highway 14
CountyWashtenaw County
StateMichigan
Coordinates42.30074, -83.78102
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 inspectionSeptember 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 alignment7: Better than present minimum criteria
Operating rating97.9 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43.1 m)
Longest span65 ft (19.8 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,982 (2014)
Projected traffic22,979 by 2034
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$81,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-14 EB over Maple RD built?

It was built in 1966, making it 59 years old in 2025.

What condition is M-14 EB over Maple 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 September 2024.

How much traffic does M-14 EB over Maple RD carry?

About 19,982 vehicles per day (2014 count), of which roughly 9% are trucks.

How long is M-14 EB over Maple RD?

The structure is 141 ft (43.1 m) long with a longest span of 65 ft (19.8 m) and a deck 42 ft wide.

Who owns M-14 EB over Maple RD?

It is owned by the State Highway Agency.