Annual drain flushing at Jack Turner Dam is a critical preventive maintenance activity that helps protect the safety and long-term stability of the dam’s infrastructure.
Over time, drains within a dam can accumulate sediment, debris, and naturally occurring minerals that restrict proper water flow. Groundwater and seepage moving through soil and rock often carry dissolved iron and magnesium—common natural elements found in many watersheds. As this water moves through the drainage system, these minerals can oxidize and form hard deposits or scale along drain pipes and collection galleries.
This mineral buildup, combined with fine sediments, can gradually narrow drain openings and reduce the system’s ability to relieve internal water pressure. When drains become clogged, pressure can increase within the dam structure, potentially placing stress on the dam and reducing the reliability of safety monitoring systems.
Annual flushing removes these mineral deposits and sediments, ensuring seepage flows freely and confirming that the drainage system continues to operate as designed.
At Rockdale Water Resources, the Water Supply Division leads this essential maintenance as part of its commitment to protecting the county’s drinking water sources, maintaining dam safety, and ensuring reliable infrastructure for the community.
Although largely unseen by the public, this routine work plays a vital role in safeguarding water supplies, protecting infrastructure investments, and ensuring the safety of downstream communities.
