ASTRID CONTRACT TECHNICAL SERVICES, INC.
The Contractor shall sandblast, clean, repaint the exposed, exterior portions of all eight penstocks, eight spiral case doors, eight draft tube doors, eight penstock drain valves, associated piping, eight TWD Electrode wells, and four turbine bottom discharge ring ?rat races? at the Richard B. Russell Dam and Lake Project.
Remove, replace, and torque the Baker Bolts to 90 ft/lbs on the eight penstocks.
These items are all located in the penstock gallery, floor el. 295 msl. The exposed penstocks are approximately 26 feet in diameter and are exposed for a distance of approximately 27 feet. The top of the penstocks are approximately 32 feet from the floor.