Michael Gordon adds:
This is just from my observations, but I noticed as of a few weeks ago that they seem to be running a trench from Cottonwood Creek into Owens Lake. I know the city of LA has been made legally responsible by law to mitigate the damage. My guess is they are diverting water from Cottonwood Creek to the lake to start wetting it better.
Ron Norton adds:
The plan is to cover the entire Owens Valley dry lake bed with a combination of three dust control measures: shallow flooding (which you can now see), managed vegetation (they found something that actually likes the soil out there!), and the rest of the lake bed will be covered with gravel. For more information than you could ever possibly want to know, see:
http://www.epa.gov/region09/air/owens/index.html