Pipe Columbia River Water to the Colorado?

Laura Dobbins of The Daily Independent of Ridgecrest, California reports on seven ideas for getting more water into the Colorado River basin. In a report paid for by the Southern Nevada Water Authority, and presented to Secretary of Interior Dirk Kempthorne and water managers from the 7 Western states that share the Colorado River, one idea particularly caught my attention:

Undersea pipeline - This would carry fresh water to Southern California from the Columbia River.