| Lake Ontario / St. Lawrence River | 1:100 Year Water Level | Notes |
| Lake Ontario Seasonal High Water Level | 75.1 m | |
| Bay of Quinte West Watershed limited to Glenora Ferry Terminal (MTO east property line) | 75.9 m | |
| Glenora Ferry Terminal to Centreline Millhaven Creek | 75.8 m | |
| Centreline Millhaven Creek to East limit of Gananoque | 76.0 m | 2 yr = 75.4 m
5 yr = 75.6 m 10 yr = 75.7 m 25 yr = 75.8 m 50 yr = 75.9 m |
| East limit of Gananoque to East limit of Brown's Bay Park | 75.9 m | |
| Brown's Bay Park to East Watershed limit | 75.8 m |
All elevations correspond to Geodetic Survey of Canada (GSC) datum, 2001.