From WDWMAGIC.com:
Backstage at AK, the parking lot is FULL of WDI fleet vehicles, Disney corporate cars, and CONSTRUCTION COMPANY CARS. Normally the lot is empty. Second, backstage between Rafiki's Planet Watch and Kali River Rapids, there is a 1-1.5 acre lot that's been sealed off from access. In there, there was a 15 foot tall dirt hill, and several construction permits, along with more WDI vehicles and construction company vehicles. Lastly, a new doublewide trailer is being delivered, and a Nationsrent company vehicle (Nationsrent specializes in hiring construction equipment to companies and individuals).
It does not say the ride will only cover 1 - 1.5 acres of land. Nor, are we saying this area will not be implemented in the Construction of the ride. We are saying that the total ride will have to cover more than 1.5 acres.
It seems to be an interpretation issue to me.
Use some Logic here, the coaster cannot be fit into an acre of land.