5 bridges with vertical clearance data on 66 in Arkansas. Lowest: 156.8ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 156.8ft | Cr 66 White Co. | Little Red River | .25Mi So Of 385 @ Judsoni | 1924 | Map |
| 989.8ft | Cr 66-C Traskwood | Brushy Creek | 2 Mi E Glen Rose | 2005 | Map |
| 989.8ft | Traskwood Rd/Cr66 | Ten Mile Creek | .14 M E Cr 66 & Us 67 | 2008 | Map |
| 3277.6ft | Columbia Cr 66 Z-C | Henderson Creek | 0.87 Mi W Jct Cr 63 | 2006 | Map |
| 3277.6ft | Cr3271 | Creek | 1.43 Miles Nw Of State Hw | 2022 | Map |