Grosse Ile Parkway over Trenton Channel
PoorPosted for loadWayne County, Michigan · Grosse Ile · Structure no. 000000000012006
- Built
- 1932
- 93 years old, rebuilt 2007
- Condition
- Poor
- inspected June 2024
- Type
- Movable - Swing
- Steel Continuous
- Length
- 1,346 ft
- 2 main spans
- Daily traffic
- 22,180
- 2007 count
- Owner
- County
- County Highway Agency
About this bridge
Grosse Ile Parkway over Trenton Channel is a steel continuous movable - swing carrying Grosse Ile Parkway over Trenton Channel in Wayne County, Michigan. It was built in 1932 and reconstructed in 2007, so it is 93 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 22,180 vehicles a day, roughly 2% of them trucks, projected to reach 27,060 by 2027. The structure is 1,346 ft (410.2 m) long and 32 ft wide. If it were closed, the detour would be 124.3 mi (200 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grosse Ile Parkway over Trenton Channel built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2007.
What condition is Grosse Ile Parkway over Trenton Channel in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.
How much traffic does Grosse Ile Parkway over Trenton Channel carry?
About 22,180 vehicles per day (2007 count), of which roughly 2% are trucks.
How long is Grosse Ile Parkway over Trenton Channel?
The structure is 1,346 ft (410.2 m) long with a longest span of 170 ft (51.8 m) and a deck 32 ft wide.
Who owns Grosse Ile Parkway over Trenton Channel?
It is owned by the County Highway Agency.