The Point Reyes National Seashore announced it will start removing oyster racks and aquaculture debris from Drakes Estero, a year and a half after Drakes Bay Oyster Company ceased operations. The National Park Service and the National Park Foundation are devoting $4 million for the work on the marine wilderness, which is slated for completion by early 2017. The cleanup entails removing five miles of wooden oyster racks that weigh 477 tons with a mechanical…