From Big Dig to Lake Dief: Regina's Clifton Associates chosen for irrigation megaproject "We look forward to continuing the tradition of prairie innovation — applying Saskatchewan talent to deliver a legacy project for the people of Saskatchewan." Author of the article: Regina Leader-Post Publishing date: Feb 04, 2021 • February 4, 2021 • 2 minute read • In this 2005 file photo, Wayne Clifton stands on an overlook by Wascana Lake. His work on the Wascana Lake 'Big Dig' earned him an award from the Professional Engineers and Geoscientists of Saskatchewan. Clifton and Associates Ltd. will be doing work on the Lake Diefenbaker Irrigation Expansion. Josh Sawka Article content The same Regina-based engineering firm that handled the so-called “big dig” of Wascana Lake has been chosen to work on what the province has billed the largest infrastructure project in Saskatchewan’s history.