Thanks for the link to the map. This is the exact location that I was thinking of. I found the following information on the Dartmouth Crossings rezoning request for the adjacent property:
http://www.halifax.ca/planning/documents/Case01222FactSheetPIM.pdf. According to this information they did not include this site in the residential plans.
The Dartmouth Crossings website;
http://www.dartmouthcrossing.com/aboutus/index.cfm/id/767 ; states that the rezoned area is atop of the quarry wall: "
The re-zoned land is located at the north end of Dartmouth Crossing atop the quarry wall, sloping down to Hwy 118 and Lake Charles."
From the Bing maps it looks like the old quarry area is about 200 meters by 300 meters. Which would be just about what would be needed for a stadium. Would some Skyscraperpage forum-er be interested in emailing Dartmouth Crossing and ask them what the plans are for this area? Maybe they could propose it to HRM council and if Dartmouth Crossings owns it then offer it to HRM at a good price for use as a stadium. I know this all sounds far-fetched but it is worth a try. I am not currently living in the Halifax area, otherwise I would do it myself.