ScourStop: The Rip Rap Alternative http://www.scourstop.com/index.php ScourStop Erosion Control News City of Waukee Prefers to be a 'Green' MS4 http://www.scourstop.com/erosion-news.php?nid=7 The first MS4 in Iowa to issue a Letter of Preference for soft armor. ScourStop Awarded Rare Public Interest Finding http://www.scourstop.com/erosion-news.php?nid=6 Iowa DOT and FHWA Concur On PIF