Tongzilin Hydroelectric Project is situated in Yanbian County of Panzhihua Municipality, Sichuan Province, 18km to its upstream Ertan Dam and 15km to the confluence of the Yalong and Jinsha rivers. It is the last cascade project on the Yalong River.

The total installed capacity of the project is 600MW (4¡Á150MW). The complex consists of the water-retaining dam sections on both sides, a river-bed type powerhouse, and spillway structures. The maximum dam height is 66.63m, and the length of the dam crest is 468.7m.