Heavy Duty Stop Logs have been used successfully by engineers in a wide range of applications for over 20 years. Engineered composite stop logs are in service throughout the world in wastewater treatment plants, water treatment plants, fish hatcheries, sludge drying beds, and composting facilities and for lagoon control, flood control, and diversion. Plasti-Fab Heavy Duty Stop Logs feature a unique seamless construction that fully surrounds an internal structural skeleton.