I assume that anonymouscactus got it from here:http://amusementgraffixintl.com/forums/viewtopic.php?f=1&t=1651&start=25
Unfortunately, you have to be registered at the website to log in (I'm not advertising for the site; just providing evidence)
To summarize the topic if you are not a member or if you are not willing to register: They are not "official" documents per se, but these were text and images compiled from an actual park survey done a little while ago. The official announcement will be in March. He (username = "good_life") claims, however, that he was told by one of the higher up staff as to what the rides were and he won't completely spill the beans, but he decided to "tease a little" as to what they were since this was technically public information already. He also mentioned the following three things that were also possibilities:
1: The adult ticket price would be lowered to $29.99
2: The new rides would be put near the scrambler (for those who haven't been to Darien Lake before, that's in the south east corner of the park, between Viper and Mind Eraser if you want to look it up on Google Earth)
3: Another unexpected ride might be removed for these additions.
I'm still skeptical as to whether or not these are similar to what they really are. And based on the description of Moose on the Loose, I think that that would be more of an kiddie monorail ride similar to that "Snoopy's Rocket Express" that was just recently put into Dorney Park's renovated Planet Snoopy, but that is only me taking a guess based upon the sketch and the "bigger than a kiddie ride but not quite a coaster" part of the description. Frankly, I think that if these rides were to be built, they would be a great addition to the park. For those who haven't been to Darien Lake, the park has very few choices where adults can ride with their little kids that are in the 36" range. These have a nice theme that I have a feeling will work quite well for the park as Herschend begins to give the park some sort of theme to start bringing it up to par with Dollywood and SDC.