DESCRIPTION:
SPILLWAY TO TUNNEL due to security reasons i could not get an answer as to a comment made but the good probatility no turbine would be installed at the base of this tunnel as overflow water happened only once in 1983 for a brief period. because water levels are always low, turbines are now being replaced with more efficient ones that have a more favorable blade pitch to take advantage of less water pressure through the tunnels used for power generation.