Merrydale Road over US 101 & Merrydale RD
FairMarin County, California · 04-MRN-101-13.50-SRF · Structure no. 27 0110
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 377 ft
- 4 main spans
- Daily traffic
- 9,170
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
Merrydale Road over US 101 & Merrydale RD is a prestressed concrete continuous box beam or girders - multiple carrying Merrydale Road over US 101 & Merrydale RD in Marin County, California. It was built in 1996, so it is 29 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 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 9,170 vehicles a day, roughly 2% of them trucks, projected to reach 12,921 by 2041. The structure is 377 ft (114.8 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Merrydale Road over US 101 & Merrydale RD built?
It was built in 1996, making it 29 years old in 2025.
What condition is Merrydale Road over US 101 & Merrydale RD 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 2023.
How much traffic does Merrydale Road over US 101 & Merrydale RD carry?
About 9,170 vehicles per day (1998 count), of which roughly 2% are trucks.
How long is Merrydale Road over US 101 & Merrydale RD?
The structure is 377 ft (114.8 m) long with a longest span of 132 ft (40.1 m) and a deck 53 ft wide.
Who owns Merrydale Road over US 101 & Merrydale RD?
It is owned by the State Highway Agency.