SCOURSTOP ScourStop is used in a variety of applications where rock rip rap is thought to be the best answer to stop scour and erosion. Rip rap is not only unsightly but can be a nuisance to maintain and can also be a hazard in vehicle were to leave he roadway. Scour Stop is used for culvert outlets, weir overflow areas, stream banks, highway and parking lot pavement runoff and channels.