State Route 20 over Idaho-Maryland Road
FairNevada County, California · 03-NEV-020-R13.61-GVY · Structure no. 17 0079
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 89 ft
- 1 main span
- Daily traffic
- 47,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 20 over Idaho-Maryland Road is a concrete box beam or girders - multiple carrying State Route 20 over Idaho-Maryland Road in Nevada County, California. It was built in 1969, so it is 56 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 47,000 vehicles a day, projected to reach 78,834 by 2041. The structure is 89 ft (27.1 m) long and 92 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 20 over Idaho-Maryland Road built?
It was built in 1969, making it 56 years old in 2025.
What condition is State Route 20 over Idaho-Maryland Road 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 State Route 20 over Idaho-Maryland Road carry?
About 47,000 vehicles per day (2020 count).
How long is State Route 20 over Idaho-Maryland Road?
The structure is 89 ft (27.1 m) long with a longest span of 87 ft (26.5 m) and a deck 92 ft wide.
Who owns State Route 20 over Idaho-Maryland Road?
It is owned by the State Highway Agency.