Porter Mountain RD over Billy Creek
Good Condition43 years old9,443 vehicles/day
Location
| State | Arizona |
| County | Navajo |
| Location | 0.1 Mi NE Jct SR 260 |
| Carries | Porter Mountain RD |
| Crosses | Billy Creek |
| Coordinates | 34.15746, -109.97317 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 69.9 ft (21.3 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 215.1 sq m |
| Main Spans | 3 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 9,443 (2022) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 08773 |