Cika wannan jumla: Ma'adinan ya samar da kwal don kasuwannin masana'antu, yana samar da kwal mai kwalliya, kwal mai kwal, kwal mai kwal da kwal mai kwal. Ba da daɗewa ba bayan budewa, an shafe shi ta hanyar
ma'adinai yajin aiki na 1926, amma samar da aka ci gaba daga baya. A shekara ta 1938 ma'adinan ma'adinai mallakar Firbeck Main Collieries Ltd na Chesterfield ne, wanda ya ɗauki ma'aikata 1,457 da ma'aikata 357. Bayan da aka sanya shi cikin ƙasa a cikin 1946, ya zama wani ɓangare na yankin Aikin Aiki na No.1 na National Coal Board. A lokacin da ma'adinan ke da ƙarfi a shekara ta 1953, ma'aikata 1,448 ne ke aiki a ƙarƙashin ƙasa da kuma 393 da ke aiki a sama. Matsaloli sun faru a hankali, kamar yadda ruwan ya shafi ma'adinai, matsalolin iska da kuma kuskuren geological. Jirgin kwal zuwa farfajiyar ya yi jinkiri, kamar yadda shafts ba su dace da shigar da kayan kwalliyar inji ba, kuma a shekarar 1968, an yi la'akari da ma'adinan ba shi da tattalin arziki. An rufe shi a ranar 31 ga Disamba, 1968, kuma da yawa daga cikin masu hakar ma'adinai sun koma wasu ramuka na gida a Maltby, Manton, Shireoaks da Steetley.