To support maintenance associated with hydroelectric power generating activities at the New Exchequer Dam operated by the Merced Irrigation District, Water & Power, HPC was retained to remove concrete underlying the Valve Hood Liner (VHL). Using its 363 Conjet Robot and Hammelmann ultra-high pressure pump, HPC completed hydrodemolition of concrete within the repair zone, an area 23′ long by 22.5′ diameter to a depth of from 6 – 12 inches.