1947 - 1977 production levels and output per manshift

1940s

• Deep Hard seam reopened and power loading introduced
• Production from Top Hard, Dunsil and 1st Waterloo seams

1950s

• North shaft extended to 2nd Waterloo level
• Cessation of production in Top Hard seam
• Production expands from Dunsil, 1st Waterloo and Deep Hard

1960s

• Development of Piper seam
• Cessation of production in Dunsil seam
• Development of 2nd Waterloo seam begins
• Cessation of production in north-side Deep Hard seam
• Cessation of production in 2nd Waterloo seam

1970s

• Cessation of production in 1st Waterloo seam
• Cessation of coal winding at North pit
• Development of  south-side Deep Hard seam
• Cessation of production in Piper seam
• Development of combined Deep Hard / Piper seam

1980s

• Production expands from combined Deep Hard / Piper seam
• Cessation of coal winding at South pit
• Cessation of man winding at South pit
• Closure of colliery
• Demolition of  most of surface infrastructure and buildings
• Emergency listing of  headstocks and engine-houses.