Sorry about the terrible microphone volume and quality.
Of the 28 Dig Site Spawns across the map only 16 will be occupied at a time.
Once you have 16 being used no more will spawn till you dig some of the 16.
Unlockables
Golden Shovel:
Is achieved after exactly 30 digs
Golden Helmet:
It is added to the dig site loot pool after achieving the golden shovel.
It can take one more dig or thirty more to achieve.
Weather
First Round
The first round always gives four dig sites in the trenches
and it is always the same four dig sites.
The weather is always clear and does not act like normal clear weather.
Clear Skys
Spawns in three new dig sites across the map.
Raining
Spawns in five new dig sites across the map.
Snowing
Snow rounds are complicated, If you have been digging
all the spots across the map then the first snow round will
spawn in three new dig sites, one in each section (trenches, no mans, and church)
These three have very high chances of giving the part but if they do not then next snow round
will only spawn in dig sites in the locations needed.
If you have all the Ice staff parts then a snow round will spawn in NO new dig sites.