sentences:  The principal copper mining areas were to the south of Wetherlam, in what is now Coppermines Valley.Much of the activity took place on the slopes of Brim Fell to the south, but Red Dell and the ridges on either side hold many shafts, and there are workings below the bed of Levers Water.These mines were at their most productive in the 1850s, closing in 1915.