It's actually a wrong perception. I checked the topography map of Acadia, and found that it's about 100 meters above sea level. It's actually a bit higher than RR new lots currently for sale. The flood river nearby is indeed "低洼处" at around 85 meters above sea level, but Acadia is higher.那里应该是低洼处。
instead of having a much demanded walk-out basement, this type of houses has an elevated garage (not of much use) and more stairs to the front door (hard for old people and winter time), and probably even smaller basement windows. It's being disadvantaged by the slopes it resides on.而且门前那条路是进入小区的主路。
看了一下我们附近这几个小区，96-88，我的房子在96。行么？Please go to maps.ottawa.ca. It's extremely, extremely useful for property purchasing.
Select the "Topography" layer so you can see the "Deng Gao Xian" on your map. You will find that Acadia houses are around 100 meters above sea level, much higher than the carp river nearby, AND higher than Terry Fox drive.
You probably will feel standing on a highland if you look towards Terry Fox drive from Uniform`s townhouses in RR, eh?. But in reality they are below 100 meters above sea level.
That`s why I don`t think Acadia will ever get flooded, although its base soil might not be as firm as RR`s rocks.