TCB Industrial has been awarded a draft tube repair scope supporting ongoing maintenance at a Northern California hydroelectric facility. Draft tubes are critical components in hydroelectric systems, guiding water flow downstream of turbines and directly influencing efficiency, vibration behavior, and structural loading.

Maintenance and repair of these structures require careful planning due to access limitations, confined conditions, and proximity to critical civil and mechanical elements.

Nature of draft tube repair work

Draft tube repair scopes often address wear, surface degradation, localized damage, or interface issues that develop over years of operation. These conditions can affect hydraulic performance and introduce long-term structural concerns if left unaddressed.

TCB’s awarded scope focuses on targeted repair activities designed to restore serviceability while minimizing disturbance to surrounding systems.

Access and sequencing considerations

Draft tubes are typically located below turbine floors and within confined geometries. Access planning is essential to ensure safe movement of personnel, tools, and materials. TCB’s execution approach includes evaluating access points, ventilation needs, and egress routes before work begins.

Sequencing is structured to limit time spent in confined conditions and to ensure that work progresses in a controlled, predictable manner.

Safety planning in confined and wet environments

Draft tube work may involve residual moisture, uneven surfaces, and limited visibility. TCB’s safety controls address these conditions through task-specific briefings, defined work zones, and continuous communication among crew members.

Where confined space considerations apply, appropriate entry procedures and monitoring practices are implemented to maintain safe conditions throughout execution.

Quality and durability focus

Repair work is performed with attention to surface preparation, interface transitions, and durability under hydraulic loading. The objective is to complete repairs that integrate cleanly with existing structures and support stable long-term operation.

What this award represents

This award reflects TCB’s experience performing specialized maintenance within hydroelectric systems. By combining access planning, safety discipline, and quality workmanship, TCB supports continued reliable operation of critical water and power infrastructure.