The River Tummel is a river in Perth and Kinross, Scotland. Water from the Tummel is used in the Tummel hydro-electric power scheme, operated by SSE. As a tributary of the River Tay, the Tummel is included as part of the River Tay Special Area of Conservation. The designation notes the river system's importance for salmon, otters, brook lampreys, river la…The River Tummel is a river in Perth and Kinross, Scotland. Water from the Tummel is used in the Tummel hydro-electric power scheme, operated by SSE. As a tributary of the River Tay, the Tummel is included as part of the River Tay Special Area of Conservation. The designation notes the river system's importance for salmon, otters, brook lampreys, river lampreys and sea lampreys.