You either worked there, lived near it or, at the very least, spotted the enormous chimney which dominated the skyline for decades.
We have 9 reminders of an iconic part of the town thanks to photos courtesy of the Hartlepool Library Service and Hartlepool Museum Service.
It may be long gone but here’s a memory or two of our town’s history.
1. Central to it all
The flow of sea water throughout the plant was controlled from this central panel. Photo: Hartlepool Library Services. Photo: Hartlepool Library Services
2. A spectacular setting
One of three settling tanks - and a lovely view up the coast. Photo: Hartlepool Library Services. Photo: Hartlepool Library Services
3. Hydration plant
The dolime hydration plant where dolime was slaked with fresh water to a fine dry powder. Photo: Hartlepool Library Services. Photo: Hartlepool Library Services
4. From the sky
Looking towards the Headland. Photo: Hartlepool Library Services. Photo: Hartlepool Library Services