West River ST over Donner Creek
GoodNevada County, California · 0.2 MI NE SR 89 · Structure no. 17C0035
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 66 ft
- 1 main span
- Daily traffic
- 6,840
- 2009 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
West River ST over Donner Creek is a prestressed concrete tee beam carrying West River ST over Donner Creek in Nevada County, California. It was built in 1959, so it is 66 years old, older than the California average of 54.8 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 6,840 vehicles a day, roughly 10% of them trucks, projected to reach 7,432 by 2046. The structure is 66 ft (20.1 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 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 West River ST over Donner Creek built?
It was built in 1959, making it 66 years old in 2025.
What condition is West River ST over Donner 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 August 2024.
How much traffic does West River ST over Donner Creek carry?
About 6,840 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is West River ST over Donner Creek?
The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 28 ft wide.
Who owns West River ST over Donner Creek?
It is owned by the City or Municipal Highway Agency.