Cold Lake was originally three communities , and was eventully formed by merging the Town of Grand Centre , the Town of Cold Lake , and Medley which was a Canadian Forces Base 4 Wing on October 1 , 1996 . Originally three communities , Cold Lake was formed by merging the Town of Grand Centre , the Town of Cold Lake , and Medley ( Canadian Forces Base 4 Wing ) on October 1 , 1996 .