Tieton Reservoir over Tieton River N. Fork
GoodYakima County, Washington · 03.21 SW SR12 (wi) · Structure no. 081296000000000
- Built
- 1956
- 69 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 140 ft
- 3 main spans
- Daily traffic
- 550
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Tieton Reservoir over Tieton River N. Fork is a concrete stringer/multi-beam or girder carrying Tieton Reservoir over Tieton River N. Fork in Yakima County, Washington. It was built in 1956, so it is 69 years old, older than the Washington average of 49.8 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 550 vehicles a day, roughly 20% of them trucks, projected to reach 800 by 2039. The structure is 140 ft (42.7 m) long and 29 ft wide. If it were closed, the detour would be 24.9 mi (40 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Tieton Reservoir over Tieton River N. Fork built?
It was built in 1956, making it 69 years old in 2025.
What condition is Tieton Reservoir over Tieton River N. Fork 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 May 2023.
How much traffic does Tieton Reservoir over Tieton River N. Fork carry?
About 550 vehicles per day (2019 count), of which roughly 20% are trucks.
How long is Tieton Reservoir over Tieton River N. Fork?
The structure is 140 ft (42.7 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.
Who owns Tieton Reservoir over Tieton River N. Fork?
It is owned by the County Highway Agency.