State Route 89 over Prosser Creek
FairNevada County, California · 03-NEV-089-4.87 · Structure no. 17 0078
- Built
- 1961
- 64 years old, rebuilt 1991
- Condition
- Fair
- inspected August 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 136 ft
- 3 main spans
- Daily traffic
- 4,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 89 over Prosser Creek is a concrete continuous tee beam carrying State Route 89 over Prosser Creek in Nevada County, California. It was built in 1961 and reconstructed in 1991, so it is 64 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 4,000 vehicles a day, roughly 13% of them trucks, projected to reach 7,644 by 2045. The structure is 136 ft (41.5 m) long and 44 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 89 over Prosser Creek built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1991.
What condition is State Route 89 over Prosser 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 August 2023.
How much traffic does State Route 89 over Prosser Creek carry?
About 4,000 vehicles per day (2020 count), of which roughly 13% are trucks.
How long is State Route 89 over Prosser Creek?
The structure is 136 ft (41.5 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.
Who owns State Route 89 over Prosser Creek?
It is owned by the State Highway Agency.