That is option "A" but they do say skeeter lake valley which is much bigger than the lake itself. I could not find anywhere that said "the lake would be filled with tailings"

4.3 SKEETER LAKE VALLEY – TAILINGS IMPOUNDMENT OPTION ‘A’

The proposed Tailings Impoundment Option ‘A’ is located in the Skeeter Lake valley (Figure 1.1-5).

The valley is approximately 10 km long, and bounded to the west by Mount LaCasse and to the east by

an unnamed mountain (Plate 4.3-1). At 800 m asl, the Skeeter Lake valley is substantially higher than

both the Schaft Creek and Mess Creek valleys (both ca. 700 m asl). Skeeter Lake itself drains north into

Schaft Creek via small streams, while south of Start Lake the valley drains southeast to Mess Creek.