There is a Big Dam and Reservoir in Riverside county that is in the process of being filled.
But I thoought that was all Colorado River Water.
But I think there is a way they could flow water to that from San Bernandino.
Here is a map and I think the Diamond Valley Lake is the new big reservoir.
It is just east of Lake Skinner.
This is from the MWD site and is Titled
The Source of your water.
