 The 2010 U.S. population within was 655,207, a decrease of 0.3 percent since 2000.Cities within 50 miles include Davenport and Moline (19 miles to city center).In 2015, Exelon's executive vice president stated that its five Illinois dual-unit power plants have costs roughly $33/MW·h to $34/MW·h of electricity produced and that its Clinton single-unit power plant costs roughly $38/MW·h to $39/MW·h.