Sinking sheave arrangement during deeping of the South shaft. circa March 1922 (FoPP/JST)

1920

• Deep Hard seam reached and putting in pit bottom arch
• South pit deepening continuing
• Driving drift to Deep Hard
• New water-softener installed on South pit-top
• Strike from Oct 16 - Nov 6
• Problems with Walker fan-engine
• New winding engine ordered from Markhams
• Lower seams proved down to Blackshale

1921

• 21 ft diameter drum ordered for South pit
• Broken guides in North shaft halt production for 5 - 6 hours
• Deep Hard pit bottom girder frame installed
• Strike from April to June
• Water level in South shaft threatened Deep Hard inset. 3”x6” triple ram electric pump installed to pump to Top Hard pit bottom.
• Problems with drift heading after strike due to falls and water
• Aug 18: detaching hook failure allows loaded cage to fall at North pit.
• Sept: North winding engines completely overhauled, two defective valve seats renewed
• Guide rails installed in South shaft (~ 8 months)
• 9 new boilers installed and old north side boilers removed
• Old twin-drum haulage engine erected to act as temporary winding engine at South pit.

1922

• Overwind accident at the at South shaft allows cages to fall to pit bottom and destroys the temporary winding engine.
• Replacement temporary winder purchased from Gilfach Colliery in South Wales and is installed at the South pit
• New boilers being installed in East boiler-house
• Problems with Walker fan engine
• New power-house constructed and turbine-generator installed
• Drift reaches Deep Hard seam at 620 yd and links up with heading driven from pit-bottom
• 3000gall/hr three-throw electric pump installed in TH pit-bottom to pump DH water to surface
• Old South pit winding-engines removed.

1923

• New winding-engine foundations constructed
• Deep Hard headings being driven for new faces
• Exhaust steam accumulators installed and feeding the Bellis & Morcom mixed-pressure turbine
• Markham winder installed in South engine-house
• New flue constructed
• manager         :  L T Linley
• undermanager    :  J Parker
• manpower        :  1896 underground, 281 surface

1924

• New brake-engine fitted to North winder by Markham & Co. Ltd.
• Problems with screening Hards and Cobbles on South screens.
• Decided to replace South screens

1925

• Tender of £4757 to replace South screens from Plowright Bros
• South screen replacement under construction
• Recommendation that wooden guides in North shaft be replaced with steel rails. In last 3 years maintenance costs were £5000
• Replacement of wooden guides deferred
• Ex-Pleasley temporary winding-engines installed at Bilsthorpe colliery for sinking

1926

• New South screens in operation
• Need to replace 40 year old North screens at an estimated cost of £6000
• Ordered a complete screening plant including Greaves Unit Washers at a cost of £18600 from Plowright Bros
• Long Service Certificates awarded to 44 Pleasley men for 40 years service
• National miners strike

1927

• St. Johns Ambulance Division formed at Pleasley
• Production from Deep Hard terminated in June

1928

• Aerial ropeway to tip on north side of Midland Railway  cutting  constructed (SIWCo archives).
• Colliery working only 3 days per week

1929

• Pit head baths under construction.