Ontario Power Generation (OPG) is warning people about work that could change water flows without notice.
From Sept. 20 to 23, OPG is doing hydraulic assessments at its Otter Rapids Generating Station.
"The assessments, part of OPG's public waterway safety program, will result in unusual releases of water at the generating station at various times," reads the notice.
"Water levels and flows may change quickly and without notice."
People using the area downstream of the generating station are asked to use extra caution while the work's being done.