The actual Scary Bridge was on the Eel River at the future site of Avenue of the Giants:
The way you capitalized Scary, I just had to chime in. There's the Scary Bridge over Scary Creek on WV-817 just a mile south of the interchange with I-64. Before I-64 came through, there used to be a Little Scary Bridge over Little Scary Creek right next to the interchange, but this was replaced with a large culvert during the Interstate construction. According to county maps from the 1950s, Scary used to be an incorporated town (one of three little incorporated towns adjacent to Exit 44 and Exit 39 that seemingly disappeared about the time of Interstate construction, but I'm skeptical).
Scary Bridge is not worth paying attention to, except for the submerged stone arch culvert for the former Chesapeake & Ohio Railway just upstream. All of this is along the Kanawha River. Before the completion of the Winfield Locks bypass in the late 1990s, the mean water level on the Kanawha was quite a bit lower and the stone arch was only partially submerged. Scary Bridge is also home of the historical marker for the Battle of Scary. Locals call this area "The Foot of Scary Hill".