Relief Hill RD over Humbug Creek
PoorPosted for loadNevada County, California · Near Graniteville RD · Structure no. 17C0028
- Built
- 1952
- 73 years old, rebuilt 2021
- Condition
- Poor
- inspected August 2024
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 23 ft
- 1 main span
- Daily traffic
- 27
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Relief Hill RD over Humbug Creek is a steel continuous girder and floorbeam system carrying Relief Hill RD over Humbug Creek in Nevada County, California. It was built in 1952 and reconstructed in 2021, so it is 73 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. Its operating status is: posted for load restriction.
It carries about 27 vehicles a day, roughly 1% of them trucks, projected to reach 28 by 2046. The structure is 23 ft (7 m) long and 16 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 8 Very Good | No problems noted. |
| 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 Relief Hill RD over Humbug Creek built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2021.
What condition is Relief Hill RD over Humbug Creek 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 August 2024.
How much traffic does Relief Hill RD over Humbug Creek carry?
About 27 vehicles per day (2018 count), of which roughly 1% are trucks.
How long is Relief Hill RD over Humbug Creek?
The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 16 ft wide.
Who owns Relief Hill RD over Humbug Creek?
It is owned by the County Highway Agency.