CALGARY -- Calgarians wanting to stay warm while moving around the downtown core will have another option on Monday as parts of the Plus-15 system is scheduled to reopen for use. The 16-kilometre sheltered pedestrian walkway — which has 83 bridges connecting downtown buildings — was closed on Dec. 13, 2020 when the province announced strict COVID-19 measures. With some of those measures set to ease on Feb. 8, most of the walkways are being reopened Mondays to Fridays from 7 a.m. to 6 p.m. Select parts will also be open on Saturdays and Sundays from noon to 5 p.m. Some Plus-15 sec...