N Big Trees Prk RD over San Lorenzo River
PoorSanta Cruz County, California · H Cowell ST Pk · Structure no. 36P0013
- Built
- 1931
- 94 years old
- Condition
- Poor
- inspected October 2023
- Type
- Girder and Floorbeam System
- Concrete Continuous
- Length
- 145 ft
- 3 main spans
- Daily traffic
- 500
- 2016 count
- Owner
- State
- State Park, Forest, or Reservation Agency
About this bridge
N Big Trees Prk RD over San Lorenzo River is a concrete continuous girder and floorbeam system carrying N Big Trees Prk RD over San Lorenzo River in Santa Cruz County, California. It was built in 1931, so it is 94 years old, older 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 524 by 2043. The structure is 145 ft (44.2 m) long and 36 ft wide.
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N Big Trees Prk RD over San Lorenzo River built?
It was built in 1931, making it 94 years old in 2025.
What condition is N Big Trees Prk RD over San Lorenzo River 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 October 2023.
How much traffic does N Big Trees Prk RD over San Lorenzo River carry?
About 500 vehicles per day (2016 count), of which roughly 1% are trucks.
How long is N Big Trees Prk RD over San Lorenzo River?
The structure is 145 ft (44.2 m) long with a longest span of 75 ft (22.9 m) and a deck 36 ft wide.
Who owns N Big Trees Prk RD over San Lorenzo River?
It is owned by the State Park, Forest, or Reservation Agency.