Is this it? https://goo.gl/maps/mqtoyiSgzFbU8xkA6
Why would one call it 500 mile forest?
500 square miles is 320,000 acres. (500 miles) squared is 160,000,000 acres.
One other place in the body refers to 1,600,000 acres being viable to reforest.
I think it was just a typo for 500 acre.