| 11. | The engine house and steam engine of the Ellenroad Ring Mill are preserved.
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| 12. | These engines house the hardware for all the data processing capabilities.
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| 13. | By 1644, an engine house had been added to the mill.
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| 14. | The Number 3 Engine House was converted to a storage facility.
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| 15. | The railway engine house no longer exists at the old offices.
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| 16. | The engine house would have been with a boiler house which was wide.
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| 17. | It was designed as a six storey double mill with shared engine house.
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| 18. | A machine and repair shop and an eight stall engine house were built.
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| 19. | The shops and engine house at Lonaconing were used until 1867.
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| 20. | A fire in 1926 destroyed the engine house and power plant.
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