Morrison Dam Spillway Upgrades
Morrison Dam is located on the East Poplar River near Coronach, Saskatchewan. The dam was constructed in the mid-1970’s and impounds Cookson Reservoir, which is used by SaskPower as a source of cooling water for the nearby Poplar River Thermal Power Station. Portions of the original earthen dam had experienced significant seepage and the service spillway structure, fuse-plug emergency spillway channel, and low level outlet (LLO) structure were in need of repairs. KCB’s scope included preliminary and detailed designs and construction supervision of measures to address seepage and rehabilitate the spillways and LLO. The adopted measures consisted of providing a soil-cement-bentonite and jet grout cutoff wall, replacement of the chute sections of the spillway including the underslab drainage system, upgrades to the spillway gates and hoists, expansion and upgrades to the emergency spillway, and rehabilitation of LLO structure including gates and hoists.