StormReady
Beach Stone Lakes/Point Pleasant Flood Preparedness Plan
Major floods in recent history and their recorded high water elevations are listed in the following table:
| Year | High Water Elevation
(feet, NGVD1929 datum) | Location | | 1955 | 10.7 | Lambert Road north | | 1958 | 11.8 | Lambert Road north | | 1982 | 11.5 | Hood Franklin Road | | 1983 | 10.5 | Hood Franklin Road | | 1986 | 14.0 | Lambert Road north | | 1997 | 11.8 | Lambert Road north |
1986
The 1986 storm caused the highest recorded flood elevations in the Point Pleasant area. It occurred over a 10-day period from February 11 through 20. Rainfall exceeded the 100-year frequency over many portions of the drainage area. Peak flows in the Cosumnes and Mokelumne rivers averaged between 60-to 110 year frequency, and Morrison Creek averaged 50- to 60-year frequency. 1997
The 1997 storm was the largest recorded event on the Cosumnes River, with peak flow at the Michigan Bar stream gauge estimated to be close to a 200-year event. Many Cosumnes levees breached during this storm. |
Return Period for Total Storm Depth 1986
 | 1986 Historical Flooding
 | 1986 Observed Stages
 | 1997 Historical Flooding
 | 1997 Observed Stages
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