W380-N&S101 Conn over US 101 I 380 EB Con Rmps
PoorSan Mateo County, California · 04-SM-380-6.40-SBR · Structure no. 35 0271F
- Built
- 1976
- 49 years old, rebuilt 1987
- Condition
- Poor
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 2,925 ft
- 11 main spans
- Daily traffic
- 5,000
- 2001 count
- Owner
- State
- State Highway Agency
About this bridge
W380-N&S101 Conn over US 101 I 380 EB Con Rmps is a prestressed concrete continuous box beam or girders - multiple carrying W380-N&S101 Conn over US 101 I 380 EB Con Rmps in San Mateo County, California. It was built in 1976 and reconstructed in 1987, so it is 49 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 5,000 vehicles a day, roughly 6% of them trucks, projected to reach 8,342 by 2042. The structure is 2,925 ft (891.5 m) long and 40 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was W380-N&S101 Conn over US 101 I 380 EB Con Rmps built?
It was built in 1976, making it 49 years old in 2025. It was reconstructed in 1987.
What condition is W380-N&S101 Conn over US 101 I 380 EB Con Rmps in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.
How much traffic does W380-N&S101 Conn over US 101 I 380 EB Con Rmps carry?
About 5,000 vehicles per day (2001 count), of which roughly 6% are trucks.
How long is W380-N&S101 Conn over US 101 I 380 EB Con Rmps?
The structure is 2,925 ft (891.5 m) long with a longest span of 215 ft (65.5 m) and a deck 40 ft wide.
Who owns W380-N&S101 Conn over US 101 I 380 EB Con Rmps?
It is owned by the State Highway Agency.