After years of discontent with the Chesapeake Bay`s progress under the federal interstate agreements, a number of state officials have filed, 2009, the regional associations and the Chesapeake Bay Foundation filed a lawsuit to compel the EPO to comply with its CWA obligations and the Chesapeake 2000 agreement and to establish and implement water quality programs in the Chesapeake Bay.76 In response to this complaint, in response to this complaint, the parties have reached a transaction agreement, 77 As part of the agreement, states should submit implementation plans for the EPA review on a biannual basis.78 The U.S. Geological Survey (USGS) , the Ministry of the Interior`s Scientific Authority (DOI) has a crucial role to play in providing objective science (DOI) to document and understand the evolution of the Chesapeake Bay ecosystem and its watershed. The human population of the bay, which increased from 8.1 million in 1950 to nearly 16 million in 2000, has led to a deterioration in water quality, habitat loss and a decrease in fish and bird populations. USGS scientists are at the forefront of understanding the cause and impact of human activities and natural changes on water quality and ecosystem health. The USGS interacts with resource managers and policy makers to use science, adapt implementation approaches and assess the effectiveness of management measures for ecosystem conservation, restoration and sustainability. The same parties agreed in 1987 on a second Chesapeake Bay Agreement, which examined in more detail the concerns regarding the Bay.61 The 1987 agreement set a number of general objectives and set specific objectives for each objective. A timetable has also been established for achieving objective and objective outcomes. For example, the 1987 agreement required the parties to adopt and adopt a basin-wide strategy to bring at least 40% less nitrogen and phosphorus to the main Chesapeake Bay strain by the year 2000 within six months of their adoption.62 The 1987 agreement also confirmed the role of the Intergovernmental Council, which confirmed the role of the Intergovernmental Council, 63 The 1983 Chesapeake Bay Agreement (December 9, 1983), available www.chesapeakebay.net/content/publications/cbp_12512.pdf. Chesapeake 2000 (June 28, 2000), available from www.chesapeakebay.net/documents/cbp_12081.pdf. Memorandum of Understanding Among the State of Delaware, The District of Columbia, State of Maryland, State of New York, The Commonwealth of Pennsylvania, Commonwealth of Virginia, State of West Virginia and United States Environmental Protection Agency regarding cooperative efforts to protect the Chesapeake Bay and its rivers, available at www.chesapeakebay.net/content/publications/cbp_12085.pdf.