citation needed 

"To this day the Sierra Club and its allies want to dynamite Hetch Hetchy and restore it to nature." 76.105.223.232  
they demand "draining Hetch Hetchy Reservoir and restoring Hetch Hetchy Valley" which explosive is to be used they don't specify.    

They don't "demand" anything. What is specifically said is this:
"We urge Secretary of the Interior Donald P. Hodel to undertake immediately a feasibility study leading to a recommendation for draining Hetch Hetchy Reservoir and restoring Hetch Hetchy Valley."

and

"We call upon all interests to take an open-minded, long view of this issue, and to study and assess alternatives to meeting their needs and concerns through alternative sources of water, power and revenue."

But it's kind of hard to frame that as them wanting to bomb the dam, isn't it? You also don't mention that debate - and studies - on the matter were still ongoing as of 2006. Frankly, if that's the quality of your writing, I can see why you're editing at Conservapedia. .76.105.223.232