In-Ko-Pah RD over Boulder Creek
FairImperial County, California · 0.44 MI E/O Sd CO Line · Structure no. 58C0039
- Built
- 1932
- 93 years old
- Condition
- Fair
- inspected December 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 138
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
In-Ko-Pah RD over Boulder Creek is a concrete continuous culvert carrying In-Ko-Pah RD over Boulder Creek in Imperial County, California. It was built in 1932, so it is 93 years old, older than the California 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 138 vehicles a day, roughly 1% of them trucks, projected to reach 204 by 2042. The structure is 26 ft (7.9 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was In-Ko-Pah RD over Boulder Creek built?
It was built in 1932, making it 93 years old in 2025.
What condition is In-Ko-Pah RD over Boulder 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 December 2024.
How much traffic does In-Ko-Pah RD over Boulder Creek carry?
About 138 vehicles per day (2016 count), of which roughly 1% are trucks.
How long is In-Ko-Pah RD over Boulder Creek?
The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 36 ft wide.
Who owns In-Ko-Pah RD over Boulder Creek?
It is owned by the County Highway Agency.