On the RadioWest board Jon from Edmonton mentions he cannot hear them at all at his location due to dominance from CJUV 94.1 in Lacomb (near Red Deer) and splatter from CBC Radio One 93.9 Edmonton. On 850 CKBA was a regular in Edmonton.
The list of existing AM stations in rural Alberta is shrinking real fast. Two more are set to flip to FM later this year, CKVH 1020 High Prairie and CHLW 1310 St. Paul. Also I hear that CKKY 830 in Wainwright will re-apply shortly with new proposed contours. Their application for an FM flip was rejected earlier this year due to concerns over those initial contours.