| Bridge Name: | Long–Allen Bridge |
| Also Known As: | La 8 Bridge |
| Carries: | 2 lanes of |
| Crosses: | Black River |
| Locale: | Jonesville, Louisiana |
| Id: | 581500220700001 |
| Design: | Swing |
| Mainspan: | 673feet |
| Length: | 673feet |
| Width: | 21.9feet |
| Below: | 11.8feet |
The Long–Allen Bridge (named for Louisiana Governors Huey Long and Oscar K. Allen) was a two-lane swing bridge carrying U.S. Route 84 (US 84) across the Black River. It connected Jonesville, Louisiana in Catahoula Parish with an unincorporated area of Concordia Parish near Wildsville, Louisiana. It was replaced by a larger bridge in 2009. The newer structure carries 4 lanes of traffic and was built at a cost of $8,610,000.