Route 100 over Keystone Boulevard
FairMontgomery County, Pennsylvania · Pottstown 11D11/3138E01 · Structure no. 000000000027297
- Built
- 1954
- 71 years old, rebuilt 1982
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 174 ft
- 4 main spans
- Daily traffic
- 37,098
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Route 100 over Keystone Boulevard is a steel continuous stringer/multi-beam or girder carrying Route 100 over Keystone Boulevard in Montgomery County, Pennsylvania. It was built in 1954 and reconstructed in 1982, so it is 71 years old, older 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 5 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 37,098 vehicles a day, roughly 11% of them trucks, projected to reach 36,018 by 2032. The structure is 174 ft (53 m) long and 72 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 100 over Keystone Boulevard built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1982.
What condition is Route 100 over Keystone Boulevard 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 June 2023.
How much traffic does Route 100 over Keystone Boulevard carry?
About 37,098 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is Route 100 over Keystone Boulevard?
The structure is 174 ft (53 m) long with a longest span of 45 ft (13.7 m) and a deck 72 ft wide.
Who owns Route 100 over Keystone Boulevard?
It is owned by the State Highway Agency.