Stop Logs

Stop logs are an essential flow control device used in water and wastewater treatment facilities. By placing these modular barriers into channels or slots, operators can either block or redirect water flow, allowing for maintenance isolation, water level adjustment, or emergency containment. The use of stop logs enhances facility flexibility and operational safety by providing a simple yet effective tool for temporary flow control or isolation. 

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Constructed from robust materials such as stainless steel, aluminum, or reinforced plastics, stop logs are engineered to withstand substantial hydrostatic pressures associated with treatment processes. Their design typically emphasizes durability, corrosion resistance, and ease of handling, making them a reliable choice for periodic or emergency use throughout various sections of a treatment plant.

• Raw sewage inlets
• Pumping stations
• Sluice gates
• Overflow channels
• Effluent channels

• Routine inspection: Check for proper seating and absence of leaks.
• Stop log handling: Periodically lift and lower stop logs for maintenance or isolation.
• Maintenance: Inspect for corrosion or damage and ensure guides and lifting devices are lubricated and functional.
• Safety: Follow proper lifting procedures to avoid injury and equipment damage.

• Stop log blades: Modular units made from corrosion-resistant metals or reinforced plastics.
• Stop log guides: Channels or frames installed in the structure to support and seal the stop logs.
• Lifting beam: Tools designed to insert, remove, or move stop logs safely and efficiently.

• Channel width and depth: Proper fit to prevent bypass and leakage.
• Anticipated hydrostatic pressure: Determines material selection and thickness of the stop logs.
• Desired level of flow control: Affects the number and size of stop log blades required.

• MasterFormat Division 44
• Section 44 42 00 – General Water and Wastewater Control Equipment

• Hydro Gate: Model HG-4 Stop Logs
• Golden Anderson: Model GA-SL Stop Logs
• Plasti-Fab: Model PFSL Stop Logs

• Sluice Gates: Suitable for larger flows or higher pressures; often more expensive and complex to install and operate.
• Penstocks: Designed for high-pressure applications such as dam outlets; similar in function but tailored for different conditions.