During planning of HPPs in the basin from 2006 to 2007, experts confirm that hydropower projects in upper reaches of the Ayeyawady River shall not submerge densely populated area and other ecologically sensible area in Myitkyina, Chipwi and Putao after several field surveys.
In March 2008, Changjiang Institute of Survey, Planning, Design and Research (CISPDR for short) prepared the Environmental Impact Assessment Outline of Hydropower Development in Upstream Ayeyawady Confluence Basin in Myitkyina, Myanmar (the Outline TOR for short)
In July 2008, MOEP (1) approved the Outline submitted by CPI.
From June to December 2008, CISPDR confirmed the environmental survey scheme with Institute of Hydroecology, MWR & CAS, Myanmar Biodiversity and Nature Conservation Association (BANCA), South China Botanical Garden, CAS and South China Institute of Endangered Animals.
From December 2008 to July 2009, an team of more than 100 experts from China and Myanmar and other 260 members surveyed the terrestrial and aquatic ecosystems and the environmental baseline, and collect information on attitude of affected people on hydropower development, their concerns and requirements through public questionnaire survey.
In March 2010, CISPDR finished the Environmental Impact Report of Hydropower Development in Upstream Ayeyawady Confluence Basin.
In January 2011, MOEP (1) approved the Environmental Impact Report of Hydropower Development in Upstream Ayeyawady Confluence Basin.