Automatic Retractable Screen
The HYDRA® ARS (Automatic Retractable Screen) system utilizes independently functioning HYDRA® Blades to effectively block solid debris from entering storm drain systems. In dry conditions, the blades remain in a vertical (closed) position to prevent the ingress of trash and floatables. As water levels rise during storm events, the blades automatically retract (open) to allow water to pass through, while still impeding the entry of larger solids.
Blade deflection and responsiveness are controlled via the patented HYDRA® “Never Jam” Multi-Tensioning System, which allows field-adjustable tuning to meet site-specific hydraulic and debris load conditions.
HYDRA® Blades are available in a variety of sizes and geometries to accommodate most standard storm drain inlet configurations. Note: The system is not recommended for openings less than 3 inches in height. For proper sizing and configuration, contact your authorized HYDRA® distributor or representative.
Hydra ARS ASSEMBLY manual
Hydra ARS 92.64% effective Year Round
The HYDRA Automatic Retractable Screen (ARS) system has undergone comprehensive third-party evaluation conducted by ADvTECH Environmental, Inc. and BLACK & VEATCH—two highly regarded firms specializing in environmental engineering and stormwater management. The assessment involved rigorous testing of key performance metrics to quantify the system’s efficiency in trash and debris capture.
The case study determined that the HYDRA ARS system achieves a trash capture effectiveness rate of 92.64%, demonstrating substantial performance in preventing litter and floatable debris from entering municipal stormwater systems and downstream receiving waters. These results confirm the ARS system’s efficacy in enhancing water quality and supporting compliance with regulatory trash reduction targets.
HYDRA TMDL Systems LLC 