Arunachal Pradesh accounts for a large percentage share of India's untapped hydroelectric potential. In 2008, the government of Arunachal Pradesh signed numerous memorandum of understanding with various companies planning some 42 hydroelectric schemes that will produce electricity in excess of 27,000 MW.[67] Construction of the Upper Siang Hydroelectric Project, which is expected to generate between 10,000 and 12,000 MW, began in April 2009.[68]