The Wally's Beach site (DhPg-8) at the reservoir is an important site for late Pleistocene to early Holocene paleontology and archaeology. It was found when the reservoir was partially drained for the construction of a new spillway in 1998. The original flooding of the reservoir had killed the vegetation and when the water level dropped, wind erosion removed layers of unprotected sand and silt, exposing trackways and bones of extinct mammals, as well as stone tools used by Paleoindian hunters. The Wally's Beach site became submerged again when the reservoir was refilled several years later. The bones and artifacts from the site are housed at the Royal Alberta Museum.