US Bridges

Pontiac Trail over US-23 SB M-14 EB

Fair

Washtenaw County, Michigan · 0.5 MI E of W JCT M-14 · Structure no. 000000000010909

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
3 main spans
Daily traffic
2,300
1995 count
Owner
State
State Highway Agency

About this bridge

Pontiac Trail over US-23 SB M-14 EB is a prestressed concrete stringer/multi-beam or girder carrying Pontiac Trail over US-23 SB M-14 EB 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 2,300 vehicles a day, roughly 5% of them trucks, projected to reach 2,645 by 2015. The structure is 134 ft (40.7 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPontiac Trail
CrossesUS-23 SB M-14 EB
Location0.5 MI E of W JCT M-14
RouteCounty Highway 2006
Coordinates42.31989, -83.73529
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
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 alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating35.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.7 m)
Longest span65 ft (19.7 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (1995)
Projected traffic2,645 by 2015
Trucks5%
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 Pontiac Trail over US-23 SB M-14 EB built?

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

What condition is Pontiac Trail over US-23 SB M-14 EB 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 Pontiac Trail over US-23 SB M-14 EB carry?

About 2,300 vehicles per day (1995 count), of which roughly 5% are trucks.

How long is Pontiac Trail over US-23 SB M-14 EB?

The structure is 134 ft (40.7 m) long with a longest span of 65 ft (19.7 m) and a deck 36 ft wide.

Who owns Pontiac Trail over US-23 SB M-14 EB?

It is owned by the State Highway Agency.