Sorry to sound like a noob but..

[No Nonsense]

where is the power plant exactly???
i've spoken to the gym leader and therefore got the key but i dont know where to find it
help is appreciated

[Damian Silverblade]

Go back just a bit south of the city, until you find a place where you can surf. Get in the water, and head east past the cycling road (still in the water), you'll eventually find a cave.

[No Nonsense]

Thnx