2008. >> famiglietti: right. >> stahl: '09... >> famiglietti: and now, things are going to start to getred. >> stahl: grace is confirming what the geological survey well measures have shown, but giving a broader and more frightening picture, since it shows that the rainy years are not making up for the losses. ( gasps ) '14-- dark red. that's alarming. >> famiglietti: it should be. >> stahl: so much groundwater has been pumped out here that the geological survey says it's causing another problem-- parts of the valley are literally sinking. it's called subsidence. >> faunt: so the ground basically collapses or compresses down, and the land sinks. >> stahl: the land is sinking down. she said, at this spot, the ground is dropping several inches a year. >> faunt: and north of here, it's more like a foot per year. >> stahl: that sounds like a lot, a foot a year. >> faunt: it's some of the fastest rates we have ever seen in the valley, and in the world. >> stahl: she says it's caused damage to infrastructure-- buckles in canals and sinking bridges. here the land has sunk six feet. it used to