Lolo Pass RD over Zig Zag River
GoodClackamas County, Oregon · 0.3 M NE of Zig Zag · Structure no. 19951 005 00025
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 200 ft
- 1 main span
- Daily traffic
- 2,325
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Lolo Pass RD over Zig Zag River is a steel stringer/multi-beam or girder carrying Lolo Pass RD over Zig Zag River in Clackamas County, Oregon. It was built in 2005, so it is 20 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 2,325 vehicles a day, roughly 10% of them trucks, projected to reach 2,595 by 2025. The structure is 200 ft (61 m) long and 36 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 8 Very Good | No problems noted. |
| 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 Lolo Pass RD over Zig Zag River built?
It was built in 2005, making it 20 years old in 2025.
What condition is Lolo Pass RD over Zig Zag River 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 July 2024.
How much traffic does Lolo Pass RD over Zig Zag River carry?
About 2,325 vehicles per day (2020 count), of which roughly 10% are trucks.
How long is Lolo Pass RD over Zig Zag River?
The structure is 200 ft (61 m) long with a longest span of 200 ft (61 m) and a deck 36 ft wide.
Who owns Lolo Pass RD over Zig Zag River?
It is owned by the County Highway Agency.