The Court of Appeal decision doesn't seem to be public yet, but here's where you can find:

1. The original 2014 arbitration award (union wins)
https://www.canlii.org/en/ab/abgaa/doc/2014/2014canlii23034/2014canlii23034.html?searchUrlHash=AAAAAQAFZHJ1Z3MAAAAAAQ&resultIndex=1

2. The 2016 judicial review decision at Alberta Court of Queen’s Bench (employer wins):
https://www.canlii.org/en/ab/abqb/doc/2016/2016abqb269/2016abqb269.html?resultIndex=6
(considerably shorter than the arbitration award.)