Md 4 SB over Lyons Creek
FairCalvert County, Maryland · On Anne Arundel CO Line · Structure no. 100000040017012
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 88 ft
- 3 main spans
- Daily traffic
- 46,661
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 4 SB over Lyons Creek is a steel stringer/multi-beam or girder carrying Md 4 SB over Lyons Creek in Calvert County, Maryland. It was built in 1959, so it is 66 years old, older than the Maryland average of 52.6 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 46,661 vehicles a day, roughly 8% of them trucks, projected to reach 26,584 by 2026. The structure is 88 ft (26.8 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 4 SB over Lyons Creek built?
It was built in 1959, making it 66 years old in 2025.
What condition is Md 4 SB over Lyons Creek 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 July 2023.
How much traffic does Md 4 SB over Lyons Creek carry?
About 46,661 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Md 4 SB over Lyons Creek?
The structure is 88 ft (26.8 m) long with a longest span of 44 ft (13.4 m) and a deck 46 ft wide.
Who owns Md 4 SB over Lyons Creek?
It is owned by the State Highway Agency.