County RD 20 over Big Boulder Creek
GoodGrant County, Oregon · 22.3 MI W US 26 · Structure no. 23C203020 02230
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected October 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 64 ft
- 1 main span
- Daily traffic
- 212
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
County RD 20 over Big Boulder Creek is a prestressed concrete slab carrying County RD 20 over Big Boulder Creek in Grant County, Oregon. It was built in 1996, so it is 29 years old, younger than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 212 vehicles a day, roughly 15% of them trucks, projected to reach 252 by 2025. The structure is 64 ft (19.5 m) long and 36 ft wide. If it were closed, the detour would be 70.2 mi (113 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County RD 20 over Big Boulder Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is County RD 20 over Big Boulder Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.
How much traffic does County RD 20 over Big Boulder Creek carry?
About 212 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is County RD 20 over Big Boulder Creek?
The structure is 64 ft (19.5 m) long with a longest span of 62 ft (18.9 m) and a deck 36 ft wide.
Who owns County RD 20 over Big Boulder Creek?
It is owned by the County Highway Agency.