Joseph Dean &amp; Son Woolen MillJoseph Dean &amp; Son Woolen Mill Joseph Dean & Son Woolen Mill Joseph Dean & Son Woolen Mill, also known as NVF Company, Newark Fibre Plant, is a historic woolen mill located at Newark in New Castle County, Delaware. The property includes seven contributing buildings and one contributing site. The oldest mill structure is a four-story stone structure with a corbelled brick cornice and flat roof. It is approximately by and has a brick fifth story over half its length. It was added to the National Register of Historic Places in 1982. Joseph Dean & Son Woolen Mill Joseph Dean & Son Woolen Mill, also known as NVF Company