sentences:  A vertical mine shaft similar to Redross was sunk on the nearby Wannaway ore reserve in 1971-72, and this shaft, headframe and buildings were also placed on care and maintenance.The Wannaway shaft was never activated as an operating vertical shaft mine, and was vandalised over many years and finally dismantled.An open pit commenced on the Redross minesite in the early 1990s to extract the remnants and extensions of the original Redross ore body, and a decline was added later to extract ore from underground.