State Route 139 over Howards Gulch
FairModoc County, California · 02-MOD-139-R2.23 · Structure no. 03 0011
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 73 ft
- 3 main spans
- Daily traffic
- 1,600
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 139 over Howards Gulch is a concrete continuous slab carrying State Route 139 over Howards Gulch in Modoc County, California. It was built in 1966, so it is 59 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 1,600 vehicles a day, roughly 18% of them trucks, projected to reach 2,033 by 2040. The structure is 73 ft (22.3 m) long and 34 ft wide. If it were closed, the detour would be 67.7 mi (109 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 139 over Howards Gulch built?
It was built in 1966, making it 59 years old in 2025.
What condition is State Route 139 over Howards Gulch 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 State Route 139 over Howards Gulch carry?
About 1,600 vehicles per day (2015 count), of which roughly 18% are trucks.
How long is State Route 139 over Howards Gulch?
The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 34 ft wide.
Who owns State Route 139 over Howards Gulch?
It is owned by the State Highway Agency.