Southlawn Lane over Rock Creek
PoorMontgomery County, Maryland · 0.25 MI W of Avery RD · Structure no. 200000M-0050010
- Built
- 1920
- 105 years old, rebuilt 2022
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 32 ft
- 1 main span
- Daily traffic
- 16,792
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Southlawn Lane over Rock Creek is a steel stringer/multi-beam or girder carrying Southlawn Lane over Rock Creek in Montgomery County, Maryland. It was built in 1920 and reconstructed in 2022, so it is 105 years old, older than the Maryland average of 52.6 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 16,792 vehicles a day, roughly 5% of them trucks, projected to reach 19,811 by 2042. The structure is 32 ft (9.9 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Southlawn Lane over Rock Creek built?
It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2022.
What condition is Southlawn Lane over Rock Creek 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 August 2024.
How much traffic does Southlawn Lane over Rock Creek carry?
About 16,792 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Southlawn Lane over Rock Creek?
The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.
Who owns Southlawn Lane over Rock Creek?
It is owned by the County Highway Agency.