21 Mile Road over Salt Slang Gloede Drain
PoorMacomb County, Michigan · 418 Ft West of Garfield · Structure no. 000000000006206
- Built
- 1968
- 57 years old
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 39 ft
- 1 main span
- Daily traffic
- 22,400
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
21 Mile Road over Salt Slang Gloede Drain is a steel stringer/multi-beam or girder carrying 21 Mile Road over Salt Slang Gloede Drain in Macomb County, Michigan. It was built in 1968, so it is 57 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.
It carries about 22,400 vehicles a day, roughly 5% of them trucks, projected to reach 25,100 by 2043. The structure is 39 ft (11.8 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 21 Mile Road over Salt Slang Gloede Drain built?
It was built in 1968, making it 57 years old in 2025.
What condition is 21 Mile Road over Salt Slang Gloede Drain 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 July 2024.
How much traffic does 21 Mile Road over Salt Slang Gloede Drain carry?
About 22,400 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is 21 Mile Road over Salt Slang Gloede Drain?
The structure is 39 ft (11.8 m) long with a longest span of 37 ft (11.2 m) and a deck 34 ft wide.
Who owns 21 Mile Road over Salt Slang Gloede Drain?
It is owned by the County Highway Agency.