the dirk and charlene kabcenell foundation. the vadasz family foundation. and the wyncote foundation. support is also provided by -- >> when you live in earthquake country, preparing for the next big one is a part of life. but what happened in japan on march 11th, 2011, is a terrifying reminder that sometimes, all the preparation in the world still isn't enough. >>they were planning for a magnitude 8, you know maybe an 8.3, and they got a 9, 9.1 and it just overwhelmed their coastal defenses. people were washed off the tops of the three story buildings. >>the tohoku quake killed more than 15,000 people. it turned buildings to rubble -- leveled entire villages and triggered tsunamis nearly 50 feet high. bill steele is the coordinator for the pacific northwest seismograph network at the university of washington in seattle.

foundation, the dirk and charlene kabcenell foundation. the vadasz family foundation. and the wyncote foundation. support is also provided by -- >>> from the peaks of california's high sierra, the tuolumne river springs to life. it tumbles thousands of feet into the hetch hetchy valley where a dam slows its mighty flow and pools its pristine waters for a thirsty population 167 miles to the west. >> if you're one of our 2.5 million customers in the four counties that we serve, you're getting 85% of your water from hetch hetchy. and from there, it comes through a variety of pipelines across the central valley and pipelines in the east bay. and then there are pipelines around the south bay and across the bay that brings the water to our different cuom