According to information given by the Manager at navigation Colliery in May 1950, the mining height in the No. 5 seam is about 6 feet at the top of this consist of inferior material and is loaded into separate, specially marked tubs underground and sent direct to the waste dump on arrival at the surface.
Reference:
La Grange, C.C. & Wolmarans, J.J. 1950. Washability and other characteristics of coal from the No. 5 seam coal (Run-of-mine) from nagcolliery. http://hdl.handle.net/10204/12809 .
La Grange, C. C., & Wolmarans, J. J. (1950). Washability and other characteristics of coal from the No. 5 seam coal (Run-of-mine) from nagcolliery Retrieved from http://hdl.handle.net/10204/12809
La Grange, C.C, and J.J Wolmarans Washability and other characteristics of coal from the No. 5 seam coal (Run-of-mine) from nagcolliery. 1950. http://hdl.handle.net/10204/12809
La Grange CC, Wolmarans JJ. Washability and other characteristics of coal from the No. 5 seam coal (Run-of-mine) from nagcolliery. 1950 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/12809
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