State Route 20 over Mill Street
GoodNevada County, California · 03-NEV-020-R12.16-GVY · Structure no. 17 0083
- Built
- 1969
- 56 years old, rebuilt 1984
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 102 ft
- 1 main span
- Daily traffic
- 10,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 20 over Mill Street is a concrete box beam or girders - multiple carrying State Route 20 over Mill Street in Nevada County, California. It was built in 1969 and reconstructed in 1984, 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 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 10,000 vehicles a day, roughly 6% of them trucks, projected to reach 33,303 by 2042. The structure is 102 ft (31.1 m) long and 106 ft wide. If it were closed, the detour would be 1.9 mi (3 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 20 over Mill Street built?
It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1984.
What condition is State Route 20 over Mill Street 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 July 2024.
How much traffic does State Route 20 over Mill Street carry?
About 10,000 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is State Route 20 over Mill Street?
The structure is 102 ft (31.1 m) long with a longest span of 99 ft (30.2 m) and a deck 106 ft wide.
Who owns State Route 20 over Mill Street?
It is owned by the State Highway Agency.