Further work on the ballast supply to the Southern section of the West Coast main line (TM-TD-017)

A report published in October 1982 found ballast supplied to the W.C.M.L., from Tarmac Roadstone's quarry at Hartshill, to be consistently outside the BR Specification for track ballast on the basis of wet attrition values and fines content. Since then the development of a new quarry face and extension...