Thornton Mill Road over Tributary to Western Run
GoodBaltimore County, Maryland · 0.4 MI S of Quaker Bottom · Structure no. 200000B-0193010
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 300
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Thornton Mill Road over Tributary to Western Run is a concrete box beam or girders - multiple carrying Thornton Mill Road over Tributary to Western Run in Baltimore County, Maryland. It was built in 2010, so it is 15 years old, younger than the Maryland average of 52.6 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 300 vehicles a day, roughly 5% of them trucks, projected to reach 380 by 2045. The structure is 33 ft (10.2 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| 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 Thornton Mill Road over Tributary to Western Run built?
It was built in 2010, making it 15 years old in 2025.
What condition is Thornton Mill Road over Tributary to Western Run in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does Thornton Mill Road over Tributary to Western Run carry?
About 300 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Thornton Mill Road over Tributary to Western Run?
The structure is 33 ft (10.2 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.
Who owns Thornton Mill Road over Tributary to Western Run?
It is owned by the County Highway Agency.