I looked into it a little, and the local Farmington media says that it was called Dragon's Nest (hell yeah) but they claim that it opened summer '91, and then closed a few years later. I'm really interested in figuring out if they've got bad info or if they're right; the design definitely looks like a mid-to-late '70s era concrete park.
If it really opened in '91, maybe they had been planning it back into the very late '80s, but even then it would have been a pretty antique design. Almost every '70s skatepark across the nation had at least had a reservoir section, and it was all basically based off of just two then-famous SD area naturally-occuring spots, the Escondido Reservoir and the VC Reservoir. So, if true, you had a small town in Maine using its resources to build a public skatepark suited for Ty Page to carve in, at the dawn of the Big Pants Little Wheels era. Amazing, and a little sad too, as those Farmington articles mention that someone at the Parks Department at the time apparently really worked hard to put it together, while apparently being completely naive to the fact that at that time few would have wanted it.
All of that said, along with snake runs, reservoirs are truly timeless and fun, and unfortunately very rare today. It absolutely rules that those two dudes took this project to fruition, and that the city allowed and helped them to do so.