The percentage shown above indicates the approximate water storage remaining in Chapman Lake.
The water storage calculation is based on 100% which indicates that the lake is full and at the same level as the top of the dam.
Stage 4 water conservation regulations are called based on environmental conditions, infrastructure requirements, time of year and water storage volumes.
Stage 4 may be called prior to or near the 0% mark. Water released after 0% is via siphons.
This graphic will be updated every few days during Stage 2 and Stage 3 Water Conservation Regulations.