Hydro Facilities Relicensing
Hydro Facilities Relicensing
Many of our hydro facilities have been in operation for 100 years. We have a long history and ability of operating safely while respecting the environment. We continue to meet the Canadian Dam Association Safety Guidelines and operate within the requirements of our regulator. Nothing is more important than the safety of our employees and customers. As we continue to grow our use of clean energy, we are committed to maintaining our hydro facilities and the surrounding environment. Our operation of these facilities includes public and employee safety, protection of the environment and the generation of electricity.
Each hydro system is operated in accordance with a Water Approval for Storage/Withdrawal of Water under the Nova Scotia Environment Act. These approvals are renewed on a ten-year basis and we are currently in the 3rd round of relicensing.
It is important that regulators, community members and organizations, Mi’kmaw communities and organizations, the general public and any other user of the watershed are able to participate in the relicensing process and have a means to provide valuable information toward the ongoing operation of the system.
During conversations with these interested parties, the most common issues raised and addressed include fish passage, ecological maintenance flow, reservoir elevation, flowage rights, recreational access, dam safety, commercial fishing, fish species recovery and habitat impacts.
We gather and provide information to Nova Scotia Environment as part of the application to relicense a system. A report is written to give a complete picture of the previous 10 years of operation. An overview of the system includes a summary of any changes, dam safety information, and a description of compliance with regulatory requirements. Water quality studies provide an overview of a stream and reservoir sampling program. Fish and fish habitat and species of concern are also investigated. Mi’kmaq cultural heritage is recognized as an important part of the systems. Once all information is complied and reviewed, recommendations for compliance are described.
Systems Currently being Relicensed
We are working to relicense several systems at this time including the Sissiboo Hydro System and Roseway Hydro System. Applications for these systems are due to be submitted June 30, 2022. Feedback is important to us so we can make informed decisions for our customers. If you have questions or want to better understand these systems, we encourage you to submit them by March 31, 2022 to allow us time to review and consider them as part of our application process. The deadline for public comment is March 31, 2022.
Sissiboo Hydro System
The Sissiboo Hydro System is located in Digby County, in the southwestern part of the Nova Scotia. Sissiboo Hydro drains into the Sisiboo River, which passes through the village of Weymouth and empties into St. Marys Bay.
The Sissiboo Hydro system has a drainage area of 621.6 km2 and consists of three generating stations along a thirty-two kilometer stretch of the Sissiboo River. The main reservoir is Fourth Lake, which collects all run-in from the upper part of the system. Water flows through the Fourth Lake generating station and into Sissiboo Grand Lake Reservoir, where the outflowing Sissiboo River joins the Wallace Branch of the Sissiboo River. The combined flow enters the Sissiboo Falls flowage and generating station, and on to the Weymouth Falls flowage and generating station, where it makes its way out of the river mouth and into St. Marys Bay. The Sissiboo Hydro System was constructed from 1958 to 1962; there was a significant redevelopment in 1983 when the Fourth Lake generating station was installed.
Roseway Hydro System
The Roseway Hydro System is located on the Roseway River in Shelburne County, Nova Scotia. The system originates in a chain of small lakes located at the junction of Digby, Yarmouth, and Shelburne counties, and drains an area of approximately 524.4 km². It flows in a North to South direction and empties into Shelburne Harbour.
The hydropower system was constructed in the 1930’s and had been in operation continuously up until 2012. At that time, the system was partially decommissioned. Currently, there is no active water management or electricity generation on this system. The dam and spillway structure are still in place however, the gates have been removed leaving the system as run of river.