Complex sentence: From Blackdyke Intake, the water descends down a shaft to a low-level tunnel, at the far end of which is Kennett Pumping Station, which raises the water to the surface.
Split into simpler sentences: From Blackdyke Intake, the water descends down a shaft to a low-level tunnel. At the far end is Kennett Pumping Station, which raises the water to the surface.