streamwork

Etymology
From.

Noun

 * 1)  A place where an alluvial deposit of tin ore is worked.
 * 2) * 1884, The Western Antiquary; Or, Devon and Cornwall Note-book:
 * The day is marked by the serio-comic custom of sending a young lad to the highest bound or hillock in the streamwork, and allowing him to sleep there as long as he can—[...]