When operational, the interior of these tall hollow cooling towers is honeycombed with a network of pipes and a spray system for venting the steam. After condensation, the water was recycled for return to the nearby river or re-used for industrial processes after it had played its part in driving the turbines. The horizontal concrete bars at the top of this shot are known as 'cooling baffles', and there are many thousands of them radiating out from the centre of the structure.
If you'd like to read more detail about this generation of power plants, click here to browse through an interesting little book detailing the construction of one of Thorpe Marsh's contemporaries. It provides an insight into the earliest days of Connah's Quay, a power station in Wales built to similar standards in the early fifties. Unlike this location, Connah's Quay continued to be developed and is now one of the largest combined cycle generators in the UK.