FRS 2 : An acronym for Flood Retarding Structure - most commonly used to describe earthen dams built by the Soil Conservation Service between 1950 and 1985 to protect agricultural lands
The Flood Control District of Maricopa County, Glossary of Flooding Terms, AZ, USA 2009. http://www.fcd.maricopa.gov/Education/glossary.asp x, (ND/ Flood - Amer) {477}