The chimney like structure is part of the iron furnace, which originally took locally mined ore and turned it into various items such as pipes, cannonballs, pots and pans, and stoves. After the furnace closed, it became a paper mill in 1862, but this was short lived and it closed in 1867. The County has set this aside as a historic site, and is trying to put up signage about the site and the history. Part of the ruins are fenced off for safety of visitors as well as to protect the site from those who would damage it or try to remove pieces of it.
The Lostinjersey Blog 