David P. Billington and Donald C. Jackson, Big Dams of the New Deal Era: A Confluence of Engineering and Politics (University of Oklahoma Press, 2006), p. 34 online.
Easton Devonshire, "The Gileppe Dam," Transactions of the British Association of Waterworks Engineers 9 (1904), p. 263 online, quoting a report to the Belgian government by the project's chief engineer.
John McFarlane, Economic Geography (London, 1937), p. 94 online.
Donald C. Jackson, Building the Ultimate Dam: John S. Eastwood and the Control of Water in the West (University of Oklahoma Press, 2005), pp. 22–23 online.
Belgian Tourist Office: Wallonia and Brussels, Gileppe Dam. The original capacity was 12,000,000m3, according to Easton Devonshire, "The Gileppe Dam," Transactions of the British Association of Waterworks Engineers 9 (1904), p. 270.
