This command brings up a table of the Spoil Source that is
required for the Spoil Timing commands. This displays where the
material to be placed in the spoil polylines will come from. It
shows the Site and Pit names to be mined. It also shows the Bench
number, period or strata for each bench, full name and volume. If
the SPO was created with the Surface Equipment Timing commands,
then the Period will be used instead of the Strata Names, and the
Mining Period Start and End dates will be correctly assigned.
Otherwise, from Surface Mine Reserves, just the Strata Names and
their volumes will apply.
This image shows the source of the spoil material calculated
with Surface Mine Reserves.
This image shows the Spoil Source
calculated on the same pits, but with Surface Mine Reserves, over
three benches instead. It shows the Period instead of strata names,
and the Mining Period Start and End dates are straight from the
Surface Timing command, into the SPO file. 
The Apply Swell will swell the calculated
volume stored in the SPO file. If it isn't swelled, then it will
use the in-place, bank volume. The value is a percentage greater
than 1.0. For example, 1.2 is a 20% swell of the spoiled material.
Once OK is selected, the volumes should change on screen to a
larger, swelled volume. 
The Report button will bring
up the Report Formatter where the requested fields will be reported
in the text window, or exported to Excel. Shown here is an example
text report.
Keyboard Command: edit_spo