Rural Municipality 102 Lake Johnston Rural Municipalities Member Details The Rural Municipality of Lake Johnston No. 102 is a rural municipality located north of the Town of Assiniboia and south of the City of Moose Jaw. Contact Information Mossbank, Saskatchewan S0H 3G0, Canada Chris Costley, CAO Ivan Costley, Reeve 306-354-1022 rm102@sasktel.net Get Directions By car By public transit Walking Bicycling