As Dorothea Quarry pit deepened the removal of water and the risk of flooding became a big problem. To solve this a steam driven Cornish Beam Engine was installed with a 7ft bucket and a pumping shaft of 460ft. The engine was the last Cornish Beam Engine to be installed from new anywhere in the world and operated until 1952 when electric pumps came into operation.
According to CADW, 'Almost certainly the engine is steamable given new boilers. It is complete and with only a minor amount of mechanical work, mainly with the Husbands’ Safety Gear, it could work.'
For the cache coordinates find the year the pump house was built from the date stone on the front of the building.
Let these numbers be a,b,c,d to solve this equation: N53 c(d-a).2db W004 ad.72(d-a)
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