for dredging projects, except that Coast Guard agencies would not typically be concerned. In developing in California, proposed development over bay mud layers would also have to go through a planning commission and a city council in order to be allowed. This process would respect the EIR, CEQA, and all the other bodies discussed above. In the case of San Francisco the project would have to get approved by the San Francisco Board of Supervisors. In regards to San Francisco, some interesting negative externalities are being experienced due to the dredging of land by the Bay. The Millennium Towers, which were completed in 2008, are currently sinking. This has had a negative impact on the residents of this building. In response to this subsidence, San Francisco's city attorney has decided to file a lawsuit against the developer, because the developer failed to inform the residents of the accelerated speed that the building was sinking at. If this lawsuit results in success for San Francisco this could lead to policy changes being made in the future surrounding transparency between developers and potential buyers of the developed land. Sea level rise Sea level rise will have a huge impact on the ecosystems surrounding and within bays all across the globe. Sea level rise in California will completely engulf bay mud that makes up San Francisco Bay. In order to deal with sea level rise the California Coastal Commission has adopted policy guidelines to help California. See also Estuary Glacier Liquefaction United States Army Corps of Engineers References External links U.S. Fish and Wildlife Service article on bay mud and environmental features for part of the San Francisco Bay perimeter. Student project: bay mud food web Types of soil Aquatic ecology Estuaries Marine biology Sediments Environmental chemistry Environmental soil science Morro Bay San Francisco Bay Diatom biology