Old Mill RD over Conowingo Creek
FairLancaster County, Pennsylvania · 2000 Ft SE of T-351 · Structure no. 000000000021958
- Built
- 1972
- 53 years old, rebuilt 2020
- Condition
- Fair
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 74 ft
- 1 main span
- Daily traffic
- 225
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Old Mill RD over Conowingo Creek is a prestressed concrete box beam or girders - multiple carrying Old Mill RD over Conowingo Creek in Lancaster County, Pennsylvania. It was built in 1972 and reconstructed in 2020, so it is 53 years old, younger than the Pennsylvania average of 54.8 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 225 vehicles a day, roughly 10% of them trucks, projected to reach 300 by 2032. The structure is 74 ft (22.6 m) long and 32 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Mill RD over Conowingo Creek built?
It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2020.
What condition is Old Mill RD over Conowingo 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 September 2024.
How much traffic does Old Mill RD over Conowingo Creek carry?
About 225 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Old Mill RD over Conowingo Creek?
The structure is 74 ft (22.6 m) long with a longest span of 72 ft (21.9 m) and a deck 32 ft wide.
Who owns Old Mill RD over Conowingo Creek?
It is owned by the County Highway Agency.