US Highway 101 NB over Spyglass Road
GoodSan Luis Obispo County, California · 05-SLO-101-R19.81 · Structure no. 49 0189R
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected July 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 118 ft
- 3 main spans
- Daily traffic
- 29,250
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Spyglass Road is a concrete continuous tee beam carrying US Highway 101 NB over Spyglass Road in San Luis Obispo County, California. It was built in 1964, so it is 61 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 29,250 vehicles a day, roughly 10% of them trucks, projected to reach 47,364 by 2042. The structure is 118 ft (36 m) long and 40 ft wide.
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 US Highway 101 NB over Spyglass Road built?
It was built in 1964, making it 61 years old in 2025.
What condition is US Highway 101 NB over Spyglass Road 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 US Highway 101 NB over Spyglass Road carry?
About 29,250 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is US Highway 101 NB over Spyglass Road?
The structure is 118 ft (36 m) long with a longest span of 54 ft (16.5 m) and a deck 40 ft wide.
Who owns US Highway 101 NB over Spyglass Road?
It is owned by the State Highway Agency.