NB101-ROBERTS Lake over N Br Laguna De Santa Rsa
FairSonoma County, California · 04-SON-101-15.52 · Structure no. 20 0274S
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Concrete
- Length
- 43 ft
- 1 main span
- Daily traffic
- 6,500
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
NB101-ROBERTS Lake over N Br Laguna De Santa Rsa is a concrete slab carrying NB101-ROBERTS Lake over N Br Laguna De Santa Rsa in Sonoma County, California. It was built in 2002, so it is 23 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 6,500 vehicles a day, roughly 6% of them trucks, projected to reach 8,722 by 2046. The structure is 43 ft (13 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NB101-ROBERTS Lake over N Br Laguna De Santa Rsa built?
It was built in 2002, making it 23 years old in 2025.
What condition is NB101-ROBERTS Lake over N Br Laguna De Santa Rsa 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 April 2024.
How much traffic does NB101-ROBERTS Lake over N Br Laguna De Santa Rsa carry?
About 6,500 vehicles per day (2016 count), of which roughly 6% are trucks.
How long is NB101-ROBERTS Lake over N Br Laguna De Santa Rsa?
The structure is 43 ft (13 m) long with a longest span of 38 ft (11.5 m) and a deck 44 ft wide.
Who owns NB101-ROBERTS Lake over N Br Laguna De Santa Rsa?
It is owned by the State Highway Agency.