text: It's the transmitter site for CHMJ-AM, also known as AM730 "All Traffic All The Time".  It's a class B, 50 kW station transmitting on 730 kHz.  See https://en.wikipedia.org/wiki/CHMJ and https://fccdata.org/?lang=en&canam=CHMJ for more information.
  
  On a side note, I've added the names and other details to some of the other AM stations around Metro Vancouver, so I might be able to help further if you have any more questions.
  
  I hope I was able to help.