A cofferdam was constructed for excavation of the tailrace and spillway channel, and subsequently removed. Patalganga River which is the tailrace channel of Tata Hydroelectric Power station flows through Khopoli. Boaters and swimmers are restricted from the tailrace canal. The Smith River is a tailrace stream, fed by water from Philpott Lake. Most of this water is returned to the river further downstream via a tailrace canal. The tailrace of Sutter's Mill remains, as does a nearby reconstruction. The water then is carried to the tailrace, which is another tunnel approximately wide. The slope of the tailrace is very low, about in (a 0.028% downslope). The generator transformers are located outdoors on a platform above the tailrace at . In 1997, Montana Power repainted and renovated the Tailrace Island bridge. From there, it is flushed into the tailrace and is retrieved by boat. Downstream of Pooley's Bridge and the Pumphouse lies the Tailrace. From the transformers overhead conductors carried the power across the tailrace to an outdoor switchyard. The canal passes under the unique Tokaanu Tailrace Bridge, a combined road bridge and aqueduct. After passing through the station, the water is deposited into the Tokaanu Tailrace Canal.