I do not mean to say anything bad about the company or the work they do, but I feel the need to clarify the significance of the work they do. On the single job level, they appear to do what they say they do - remove sediments and plants from a small area.
Added: 1/8/09 - The topic on Discovery Channel has been closed. At least they have admitted that what they are doing is dredging, which is more accurate. And dredging requires all sorts of permits, and design and sediment testing.
Click HERE or on Title link to view the discussion on the Discovery Channel's Dirty Jobs Fan Blog. I am "Cedar Eden" and the President Jerry Davis is "myaquacleaner" and some of the otheres are staff. The first post is just an unknown fan of the show.