RI 4718 Investigation Of Milan Copper Deposit, Coos County, N. H.

In its investigation of deposits of strategic minerals, the Bureau of Mines lid some development drilling at the Milan deposit in an endeavor to find an additional source of supply of copper. The deposit, which is in Coos County, northern New Hampshire, is about 8 miles northwest of Berlin. It was discovered in the seventies and was worked steadily until 1886, yielding a monthly production of 2,600 tons of ore. Lessees opened the mine again in 1695 and mined 1,500 tons. The Milan Mining & Milling Co. acquired the property in 1907 and made regular shipments of ore and concentrates until 1910. From 1911 until 1938, the tract was held by a local resident for timber land, Ventures, Limited, a mining concern with headquarters at 25 King Street, West, Toronto, Canada, acquired the property in 1938. No production has been recorded since 1910. To cut the vein below the old mine workings and to search for extensions to the northeast and southwest, the Bureau of Mines diamond-drilled eight holes for an aggregate of 3,596.2 feet.