RTE 20 over Big Sister Creek
PoorErie County, New York · 0.8 MI NE JCT Rts 20 +323 · Structure no. 000000001015440
- Built
- 1929
- 96 years old, rebuilt 1978
- Condition
- Poor
- inspected May 2024
- Type
- Arch - Deck
- Concrete
- Length
- 93 ft
- 1 main span
- Daily traffic
- 6,893
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
RTE 20 over Big Sister Creek is a concrete arch - deck carrying RTE 20 over Big Sister Creek in Erie County, New York. It was built in 1929 and reconstructed in 1978, so it is 96 years old, older than the New York average of 53 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 6,893 vehicles a day, roughly 10% of them trucks, projected to reach 6,958 by 2041. The structure is 93 ft (28.3 m) long and 47 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RTE 20 over Big Sister Creek built?
It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1978.
What condition is RTE 20 over Big Sister Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does RTE 20 over Big Sister Creek carry?
About 6,893 vehicles per day (2021 count), of which roughly 10% are trucks.
How long is RTE 20 over Big Sister Creek?
The structure is 93 ft (28.3 m) long with a longest span of 84 ft (25.6 m) and a deck 47 ft wide.
Who owns RTE 20 over Big Sister Creek?
It is owned by the State Highway Agency.