(a) If there is a change in operational status that affects the
respirable dust sampling requirements of this part, the operator shall report
the change in operational status of the mine, mechanized mining unit, or
designated area to the MSHA District Office or to any other MSHA office
designated by the District Manager. Status changes shall be reported in
writing within 3 working days after the status change has occurred.
(b) Each specific operational status is defined as follows: (1)
Underground mine: (i) Producing--has at least one mechanized mining
unit producing material.
(ii)Nonproducing--no material is being
(iii)Abandoned--the work of all miners has
been terminated and production activity has ceased.
(2) Mechanized mining unit:
(i)Producing--producing material from a
production of material.
(iii)Abandoned--permanently ceased production
(3) Designated Area:
(i)Producing--activity is occurring.
(ii)Nonproducing--activity has ceased.
(iii)Abandoned--the dust generating source has
been withdrawn and activity has ceased.