State Route 99 SB over Webber Canal
FairMerced County, California · 10-MER-099-19.49 · Structure no. 39 0018L
- Built
- 1919
- 106 years old, rebuilt 1953
- Condition
- Fair
- inspected December 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 30 ft
- 3 main spans
- Daily traffic
- 28,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Webber Canal is a concrete continuous culvert carrying State Route 99 SB over Webber Canal in Merced County, California. It was built in 1919 and reconstructed in 1953, so it is 106 years old, older 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 28,000 vehicles a day, roughly 20% of them trucks, projected to reach 40,546 by 2041. The structure is 30 ft (9.1 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over Webber Canal built?
It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1953.
What condition is State Route 99 SB over Webber Canal 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 December 2023.
How much traffic does State Route 99 SB over Webber Canal carry?
About 28,000 vehicles per day (2009 count), of which roughly 20% are trucks.
How long is State Route 99 SB over Webber Canal?
The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m) and a deck 42 ft wide.
Who owns State Route 99 SB over Webber Canal?
It is owned by the State Highway Agency.