A recently formed island has been discovered in British Columbia’s largest lake. B.C. Hydro revealed that this forested landmass, larger than a Canadian football field, came to rest following a drift of about 30 kilometers northwest from its previous location in the middle of Williston Reservoir.
The peculiar emergence and subsequent vanishing of the island within the vast man-made lake in northern B.C. have attracted global attention and curiosity since boaters initially spotted it in August. Satellite images from August 15 depict the island situated at the north entrance of the Ospika Arm, where it seems to be intact and has shifted even farther away from the W.A.C. Bennett Dam linked to the reservoir.
While the origin of the island remains unconfirmed, B.C. Hydro speculates that exceptionally high water levels likely led to its detachment somewhere along the reservoir’s extensive shoreline. According to B.C. Hydro spokesperson Bob Gammer, prevailing winds would have propelled it across the open waters over the past month.
The Williston reservoir, established in 1968 and ranking as the seventh-largest globally, faces erosion issues that make its banks prone to landslides. John Clague, an earth sciences professor at Simon Fraser University, noted the reservoir’s reputation for strong winds capable of generating waves and currents that undermine trees with shallow roots along the shore.
Estimated to be approximately 70 meters wide and 140 meters long, or around 9,800 square meters in area, the island is believed by B.C. Hydro to set a record in terms of size for floating wood mats with trees. B.C. Hydro aims to conduct further investigations to ascertain the island’s origins and formation process.
Residents in northern B.C. and global onlookers have shown keen interest in the island’s whereabouts. Video footage of the island floating in the reservoir gained traction in local Facebook groups in early August. Marianne Anderson, who has spent ten years operating fishing charters on Williston Lake, expressed awe at the unusual sight and recounted how the island vanished shortly after its initial sighting.
B.C. Hydro has successfully traced the island’s new location after verifying recent sighting reports. Gammer emphasized the need for caution as the island is unstable and susceptible to movement, especially if strong winds dislodge it from the shore. Boaters are advised to approach with care and refrain from attempting to climb or disturb the island.
The island’s remarkable journey and mysterious evolution have captivated observers worldwide, showcasing the unique natural phenomena found in British Columbia’s expansive water bodies.