1910

• Willans and Robinson exhaust steam turbine generator ordered at a cost of £3800.  Existing Crompton generating plant to be kept in case of breakdown

1911

• Willans and Robinson exhaust steam turbine driving a Seimens 500kW generator now operating.

1912

• Subsidence reported at Radmanthwaite  due to Top Hard workings.
• Record output of Stanton Ironworks collieries: 1,116,000 tons.

1913

• Subsidence reported at Radmanthwaite  due to Top Hard workings.
• Formal notice received from Mines Inspector to put in Safet Lamps.  Cost likely to be more than £5000 plus 1d per ton.
• A new ventilation road at a cost of £1000 to be driven through old workings to reduce the firedamp levels.  Finding an old road  shortens the driving from 6 to 3 months.
• The men protest against the introduction of Safety Lamps and by November the ventilation is improved considerably.
• Mr. J. Parker appointed Undermanager in place of Mr. W. Richardson
• Saleable output ~ 738000 tons
• Decision taken to replace no.1 Waddle fan with a more powerful Capell one

1914

• New Capell fan driven by a Bellis and Morcom engine now operational
• Analysis of air samples show less than 1/2% firedamp in the air in all districts.
• Saleable output ~ 688000 tons

• Feb:  22 year old “labourer” killed between wagons.
• Aug:  16 year old “ganger” killed whilst riding draw-bar.

1915

• Belliss and Morcom mixed-pressure steam turbine installed on E side of S heapstead

1916

• Corrections made to the Duke of Portlands lease and mineral acccount after certain properties were found to be freehold and not copyhold.
• Stanton Ironworks Co. begin preparations for a new colliery at Bilsthorpe

1917

• J.A. Longden retires as Managing Director of SIWC - replaced by Edmund James Fox who began a program of modernisation.
• Jonathan Piggford retires as agent/mining engineer due to illness - replaced by Norman D. Todd.
• Teversal and Pleasley reserves in the Top Hard seam estimated to be exhausted by 1940 (with continuingly reduced output).
• Water penetrates tubbing joints in South shaft. Will cost £1000 - £1500 to cement behind segments in both shafts
• Seimens dynamo on the Willans & Robinson exhaust turbine failed.

1918

• cage broke loose in North shaft. Repairs £3000, lost profit £2000.
• preparations underway for deepening the South shaft.
• construction underway of new fan-house.
• driving new roadway to downcast shaft to enable South district coal to be raised there during sinking at the South shaft.
• Air compressor and 25HP haulage installed for main drift heading to Waterloo seam.
• Valve chamber broken on Bellis and Morcom engine driving the Capell fan.
• Colliery consumption 4.5%, up from 3.49% in 1917, due to condition of boilers.

• manager         :  P.J. Fenwick then L T Linley
• undermanager    :  J Parker
• manpower        :  1268 underground, 221 surface

• Collieries annual output 1,032,107
• Pleasley annual output 544,384 tons.
• Total days worked 257
• Number of men 1627 ?

1919

• Capell fan engine repaired.
• Started double shift at North pit in March
• Alteration of South headgear in preparation for shaft deepening.
• Driving 1 in 4 drift to Waterloo seam. Will then drive steeper drift to Deep Hard
• Work commences on deepening the South shaft in August.
• Slight ignition of gas in No. 43s stall.

• Annual output 541,229 tons.
• Total days worked 265
• Number of men 1894