Snow at John P. Cable Mill. Cades Cove Card The cold and snow of winter isolate the idle John P. Cable grist mill in Cades Cove. Name for its builder, it is the only grist mill in GSMNP using an overshot wheel. The mill is on the 11 mile one-way Loop Road in Cades Cove near the park’s Townsend, Tennessee, entrance from U.S. 321. Corn meal ground at such mills was foremost in the diet of pioneer mountain residents. Grinding of meal is demonstrated in warmer months. This is also one of the card versions we sell.