Geosynthetics 19 ON THE COVER Trans-Canada Hwy #1; 23-foot (7-m) high reinforced rockfall embankment with gabion face, Fraser Canyon, B.C., Canada. Courtesy of Maccaferri Canada Ltd. APRIL/MAY 2021 Volume 39 Number 2 Features 10 Modular geosynthetics construction By E. Silva, T. D. Stark and Duff Simbeck 16 Development of a new design method for geosynthetic-reinforced RPEs By Pietro Rimoldi and Nicola Brusa 26 Comparative analysis of the flow and filtration capabilities of sediment retention devices-Part 2 By James E. Sprague and C. Joel Sprague 10 26 www.GeosyntheticsMagazine.com 3http://www.GeosyntheticsMagazine.com