Rocky Branch RD over Bayou Darbonne
Poor Condition52 years old117 vehicles/day
Location
| State | Louisiana |
| County | Union |
| Location | 1.1 Mi. W. Int. 489 |
| Carries | Rocky Branch RD |
| Crosses | Bayou Darbonne |
| Coordinates | 32.67867, -92.23688 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 723.1 ft (220.4 m) |
| Max Span | 57.1 ft (17.4 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 1608.9 sq m |
| Main Spans | 31 |
| Year Built | 1974 |
Traffic
| Avg Daily Traffic | 117 (2019) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 055632407921411 |