Complex sentence: In 1905, legislation was passed by New York State to allow money to be raised for the building of the Kenisco Reservoir and the next year final planning by the state was approved and preliminary surreys were started.
Split into simpler sentences: In 1905, legislation was passed by New York State to allow money to be raised for the building of the Kenisco Reservoir. The next year, final planning by the state was approved, and preliminary surreys were started.