I found BCP722 Mill Creek Ravine South.
I was up in Edmonton today to attend an event and this cap was nearby. After the event I decided to come over and grab this cap before heading home. When I got here there was a nice blanket of snow so I walked to GZ to see if I could see where the cap might be. I didn't so I grabbed my metal detector and walked back to GZ and very quickly got a positive sound. I kicked aside the snow and there was the cap. Thanks for another great cap in another nice location. TFTBC