- October 1, 1972
This map depicts the generalized pit layout and estimated waste extraction areas for 6290 bench for the month of October and November. Extraction dates as well as total unbroken tonnages are included within certain portions of the plan. Annotated details include numerical bench markers, extraction dates, total tonnages to be extracted and approximate waste tonnage calculations for October. The hand drawn plan consists of solid and broken lines drawn with red, green, orange and lead pencils as well as black ink.