the number of federal employees to 20,000 and add between 800 and 1000 residential units. In 2020, modernization began with the construction of a wholly-new central heating and cooling plant that will be more energy efficient and complete with green roof. It will replace the existing one by 2025. List of original buildings Various ministries and agencies occupy offices, in whole or in part, in Tunney's Pasture. Notes References External links Ottawa K1Y Map - Tunney's Pasture, Mechanicsville, Hintonburgh, Companies, Organizations. Sorted by Streetname Federal government buildings in Ottawa Neighbourhoods in Ottawa