Cooley Mill Road over Rock Run
GoodHarford County, Maryland · 0.7 MI SE of Rock Run RD · Structure no. 200000H-0020010
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 26 ft
- 1 main span
- Daily traffic
- 200
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Cooley Mill Road over Rock Run is a prestressed concrete box beam or girders - multiple carrying Cooley Mill Road over Rock Run in Harford County, Maryland. It was built in 1997, so it is 28 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 245 by 2039. The structure is 26 ft (7.9 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cooley Mill Road over Rock Run built?
It was built in 1997, making it 28 years old in 2025.
What condition is Cooley Mill Road over Rock 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 July 2023.
How much traffic does Cooley Mill Road over Rock Run carry?
About 200 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is Cooley Mill Road over Rock Run?
The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 16 ft wide.
Who owns Cooley Mill Road over Rock Run?
It is owned by the County Highway Agency.