South Ponderosa Wy over State Route 20
FairNevada County, California · 03-NEV-020-R10.09 · Structure no. 17 0097
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 142 ft
- 1 main span
- Daily traffic
- 75
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
South Ponderosa Wy over State Route 20 is a prestressed concrete box beam or girders - multiple carrying South Ponderosa Wy over State Route 20 in Nevada County, California. It was built in 1984, so it is 41 years old, younger 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 5 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 75 vehicles a day, roughly 5% of them trucks, projected to reach 171 by 2042. The structure is 142 ft (43.3 m) long and 31 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was South Ponderosa Wy over State Route 20 built?
It was built in 1984, making it 41 years old in 2025.
What condition is South Ponderosa Wy over State Route 20 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 July 2024.
How much traffic does South Ponderosa Wy over State Route 20 carry?
About 75 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is South Ponderosa Wy over State Route 20?
The structure is 142 ft (43.3 m) long with a longest span of 140 ft (42.6 m) and a deck 31 ft wide.
Who owns South Ponderosa Wy over State Route 20?
It is owned by the State Highway Agency.