Hi, Contact the Hospital - they will know where the records are: May have been sent to the Provincial Archive in Edmonton. [or perhaps destroyed]
Ponoka Mental Health Centre
223, 5110 - 49 Ave., Ponoka AB T4J 1R6 (403) 783-7903 http://www.albertasource.ca/aspenland/audio/heritagetrails_4...
Do an online Google search - for the following - they should be able to assist.
Glenbow Museum and Archive: http://tinyurl.com/yeuzbvd
File number: ND-2-359
Title: Alberta Provincial Mental Hospital Class, Ponoka, Alberta.
Happy New Year. Cheers, Stella