Dredging on Humboldt Bay could be done this year. So why is that such a big deal? Because it's been a decade since the bay has been cleaned and some 80 million gallons of mucky, goopy sludge has piled up. But in order to dredge the bay, the harbor district and city of Eureka need approval from the Environmental Protection Agency, along with other federal and state agencies about where to put that gunk. And those approvals are moving about as fast as boats in thick mud.