“This is: ‘Hey, we are back to life,’ ” Dan Diebolt, company vice-president of development, said Thursday. Bosa bought the 10 undeveloped acres on the 15-acre site from Vancity Credit Union, through Dockside Green Ltd., in December 2017. Today it is setting in motion the first phase of its development plans at Dockside Green. The company also owns the Fairmont Empress Hotel. The Bosa lands will hold about one million square feet of buildable area in a range of building types when it is complete in 10-plus years, Diebolt said. Some buildings will be lower-heights while others will rise to 18 storeys. Heavy equipment arrived on site in late 2020 to resume excavation to prepare for construction of three towers of 12, 13 and 15 storeys, south of the existing Balance tower on Tyee Road.