SR 208/TOPAZ RD over Simpson Canal
GoodLyon County, Nevada · South of Wellington · Structure no. B 592
- Built
- 1955
- 70 years old
- Condition
- Good
- inspected April 2023
- Type
- Culvert
- Concrete
- Length
- 38 ft
- 2 main spans
- Daily traffic
- 3,400
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
SR 208/TOPAZ RD over Simpson Canal is a concrete culvert carrying SR 208/TOPAZ RD over Simpson Canal in Lyon County, Nevada. It was built in 1955, so it is 70 years old, older than the Nevada average of 36.4 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 3,400 vehicles a day, roughly 9% of them trucks, projected to reach 8,438 by 2040. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 6.2 mi (10 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 208/TOPAZ RD over Simpson Canal built?
It was built in 1955, making it 70 years old in 2025.
What condition is SR 208/TOPAZ RD over Simpson Canal 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 April 2023.
How much traffic does SR 208/TOPAZ RD over Simpson Canal carry?
About 3,400 vehicles per day (2017 count), of which roughly 9% are trucks.
How long is SR 208/TOPAZ RD over Simpson Canal?
The structure is 38 ft (11.6 m) long with a longest span of 17 ft (5.2 m).
Who owns SR 208/TOPAZ RD over Simpson Canal?
It is owned by the State Highway Agency.