China is building a 3,000 meter airstrip by dredging. Attached link with story and satellite photo: http://en.wikipedia.org/wiki/Fiery_Cross_Reef
http://news.nationalpost.com/news/world/china-building-artificial-islands-in-the-pacific-stoking-tensions-with-neighbours
http://www.reuters.com/article/us-southchinasea-china-idUSKBN0UK1HT20160106