The 2012 Neighbourhood Plan is not financially viable as it did not resolve the complex, interrelated challenges at Tranquille. These challenges included the very substantial costs of the deconstruction and hazardous material removal (asbestos etc) of more than 40 long abandoned and deteriorating buildings, and improvements to the Tranquile River’s dams and water management infrastructure. Although the Neighbourhood Plan was adopted, a number of detailed technical studies were required in order to move forward with development. These studies, which have since been completed, revealed challenges that prevented the 2012 Neighbourhood Plan from advancing without revision. The Masterplan update, which incorporates the results of these studies, resolves Tranquille’s outstanding challenges to realize a solution that is comprehensively planned, technically sound, financially viable, yet consistent with the intent of the approved Neighbourhood Plan.