Porter Mountain RD over Billy Creek
GoodNavajo County, Arizona · 0.1 MI NE JCT SR 260 · Structure no. 08773
- Built
- 1983
- 42 years old
- Condition
- Good
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 70 ft
- 3 main spans
- Daily traffic
- 9,443
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Porter Mountain RD over Billy Creek is a concrete continuous slab carrying Porter Mountain RD over Billy Creek in Navajo County, Arizona. It was built in 1983, so it is 42 years old, younger than the Arizona average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 9,443 vehicles a day, roughly 10% of them trucks, projected to reach 9,453 by 2042. The structure is 70 ft (21.3 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Porter Mountain RD over Billy Creek built?
It was built in 1983, making it 42 years old in 2025.
What condition is Porter Mountain RD over Billy Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does Porter Mountain RD over Billy Creek carry?
About 9,443 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is Porter Mountain RD over Billy Creek?
The structure is 70 ft (21.3 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.
Who owns Porter Mountain RD over Billy Creek?
It is owned by the City or Municipal Highway Agency.