Cutoff Wall 2 : A wall of impervious material (e.g., concrete, asphalt concrete, steel sheet, piling, etc.) built into the foundation to reduce the seep rate under the dam
State of Nevada Division of Water Resources (NDWR), Dam Safety - Glossary of Terms, NV, USA 2013. http://water.nv.gov/engineering/Dams/Glossary.cfm, (Dam Sfty - Amer) {891}