Here's the latest news, I personally don't believe it will ever return except in tremendously regulated ways including environmental impact statements and site plans.
https://www.sfgate.com/science/article/Supreme-Court-leaves-California-s-ban-on-12482487.php
This is better.
https://www.desertsun.com/story/news/politics/2018/06/29/suction-dredge-mining-advocates-foes-regroup-after-clarifying-legislation-grinds-halt/742999002/