IRR N4670 over Sycamore Creek
PoorOttawa County, Oklahoma · N4685E0150007 · Structure no. 210300000000000
- Built
- 1985
- 40 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 92 ft
- 3 main spans
- Daily traffic
- 100
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
IRR N4670 over Sycamore Creek is a steel stringer/multi-beam or girder carrying IRR N4670 over Sycamore Creek in Ottawa County, Oklahoma. It was built in 1985, so it is 40 years old, younger than the Oklahoma average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 92 ft (28 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 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 |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 IRR N4670 over Sycamore Creek built?
It was built in 1985, making it 40 years old in 2025.
What condition is IRR N4670 over Sycamore 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 September 2023.
How much traffic does IRR N4670 over Sycamore Creek carry?
About 100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is IRR N4670 over Sycamore Creek?
The structure is 92 ft (28 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.
Who owns IRR N4670 over Sycamore Creek?
It is owned by the County Highway Agency.