CLARKSVILLE, Tenn. (WTVF) — Gas prices across the Clarksville area are beginning to fall after months at a four-year high, according to AAA Tennessee. Ron Smithfield, a retired business owner in Clarksville, has been closely tracking the decline — and sending photos to document it. "Well from the peak, I saw $4.29 and now it's $3.19. And I've taken pictures and sent them to you several different times," Smithfield said.