Stinnett Family / Hannum or Grass Valley Plantation

My great grandfather, George Elbert Stinnett, ran a store and owned a house on Hannum Street in Maryville. It has been handed down that he was indentured to work for the plantation near there when he was young. Does anyone know about the plantation - any drawings, photos, or records? The house was still standing when I was young (early 70's), but I do not remember when the store was demolished. 

Thanks!