Estevan & SE Sask./Manitoba Extreme SSW Border Areas
This is a projection based on maps, databases, and some personal knowledge of the area's topography. It SHOULD work for people in Estevan all the way east to roughly Kilarney, Manitoba, and maybe about 20 to 30 km northwards along that same belt, but all this certainly requires testing.
The target broadcasters are in Minot, North Dakota so your gear would need to be a deep fringe setup such as a Channel Master 4228 bowtie reflector, or a very high gain yagi like a Winegard PR9032 or a CM 4248. Expert opinion is that the CM4228 performs best in fringe and deep fringe areas. No matter which antenna, you'll also need a CM7777 or Winegard AP8275 preamp.
If you have an elevator, grain bin, or silo on your property you have a great antenna tower already in place by putting the mast way up there provided that the run of cable into the house is less than about 30 meters or you'll suffer line loss.
Your antenna could be fixed into position at the correct azimuth towards Minot. However, if and when Canadian stations go digital in the area, you'll be better off if you put your antenna on a rotator in the first place and had a CM4228.
Here are the digital stations from Minot, ND:
KMCY-DT 15 (ABC)
KMOT-DT 58 (NBC)
KXMC-DT 45 (CBS)
KXND-DT 24 (FOX)
KSRE-DT 40 (PBS)
There will be plenty more analog stations available too, and the curfew for them from the FCC is for a 2006 switchover to digital.