original: The first generator (No. 22) in the south side of the dam started working on June 11, 2007.
simplifications: The first generator on the dam started working on June 11, 2007. Generator No. 22 began operating on June 11th, 2007. The first generator (No. 22) of the dam started working on June 11, 2007. The first generator (No. 22) in the dam's south side started working June 11, 2007. The first generator in the south side of the dam started working in 2007. The first generator (No. 22) of the dam started working on June 11, 2007. The first generator (No. 22, located on the south side of the dam) started working on June 11, 2007. The south side generator (#22), was the first to start working on June 11, 2007. The first generator in the south of the dam is No.22. It started on June 11, 2007. On June 11, 2007, the first engine (No. 22) on the south side of the dam began to run.