11. Construction of a diversion tunnel started in early 1952. 12. The Swift River Diversion tunnel is in full use, bypassing water around the dam area. 13. The dam has a diversion tunnel that is. 14. Water runs from the water intake through the long free-flow diversion tunnel to the delivery chamber. 15. The original diversion tunnel became the north outlet works, abandoned and sealed in 1958 with bulkheads. 16. Construction on the dam's diversion tunnel began in October 2008 and was completed in August 2011. 17. The diversion tunnel to Sun Moon Lake has a diameter of, with a diversion capacity of. 18. The "'Lowell Creek Diversion Tunnel "'is a flood control project located in Seward, Alaska, United States. 19. The river diversion tunnel is already there . . . all our previous announcements have been deferment. 20. The reduced head was maintained while the diversion tunnel was stopped with a huge long concrete plug.
