Alessandro Island is located in Lake Perris, a reservoir created by the Perris dam built in 1973.
The lake is a popular recreation area and offers many activities including: boating, fishing, hiking, and camping.
The dam is chevron shaped with a length of 11,700 ft, height of 130 ft and a capacity of 131,452 acre ft.
It is an earth fill dam and is the southern terminus of the California State Water Project.
After a seismic hazard was identified in 2005, the water maximum lake elevation was reduced by 20 feet.
A seismic remediation project was undertaken in 2014 and is scheduled for completion in 2017.
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