Stage 8 went from Arch Lewis Canyon Lake to Martin Tank Lake. The Martin Tank Lake dam is 22260 feet wide and 230 feet high. The Lake will contain about 30,000 Acre-ft when full, about eighteen hours worth of storage.
The elevation at the Martin Tank lake will top out at 4620 feet with maximum water level at 4610 feet. The aqueduct will first descend to 3980 feet, as it crosses the Rio Grande in La Mesa, a distance of 50 miles. The elevation difference is (4620 – 3980 – 50 X 2.2) feet = 530 feet. Releasing 24,000 cfs of water 530 feet will generate 1 GW of energy for 19 hrs/day. From La Mesa it will climb to the Round Mountain Rockhound Reservoir. The dam is 400 feet high and will top out at 5360 feet with a maximum water level at 5350 feet. The total lift of the water in stage 9 is (5350 – 3980 + 160×2.2) feet = 1722 ft. To lift 24,000 cubic feet per second 1722 feet requires seven 500 MW LFTR nuclear reactors, . T he Round Mountain Rockhound Reservoir will contain about 40,000 Acre-ft of water when full, about one day of storage. For 5 hours per day these seven reactors used in this stage can provide 3.5 GW of peak power to the grid instead of pumping water, thus acting as a virtual hydroelectric peak power storage. The Round Mountain Rockhound Reservoir will look like this: