RE:Resource size - PEA ...
"$110,000,000 on a 10% discount model or $1.1 billion without the discount calculated in"
You're not doing NPV correctly.... Net present value is what of a future cash flow stream is worth based on the time value of the money and the length of time over which you're expecting to receive it.
If you're expecting to receive 1 billion next year at a 10% discount rate it's value today is $900 million... if you're going to get 200 million a year for the next 10 years and your plant is costing you say 10 million, you have a NPV of $1.2 billion. We're hoping our numbers are more robust than that. And our mine life is much longer.
Net present value calculation simply assumes the money you get in 10 years isn't worth as much as what you get today. (obvious... I know). I might also point out that 10% is pretty high in this day and age... Lower discount rates make the numbers higher for us.
Good calculator here:
https://www.investopedia.com/calculator/netpresentvalue.aspx