In western Carroll County just south of Middleburg along Little Pipe Creek lies the John Diggs Copper Mine.
The mine has its beginnings on the tract Clarks Discovery (100 acres) patented to John Diggs in 1737 (PG Co. Patent# 516). In the Archives of Maryland Online Volume 42 page 430 in the year 1742. John Diggs request from the Lord Proprietary that workers involved with the copper works be exempt from paying taxes. J
John Diggs Copper Mine (Carroll County)