Mardy Colliery, Ventilation, Development and Layout Plan, Five Feet Seam, V4 and V5 Districts

Scope and Content

Produced by National Coal Board, South Wales Area. The plan is undated but shows workings up to 1985. Scale 1:2500. Drawing number PI/1974/2.

Custodial History

Original reference: DNCB/73/18/3