Early on, the power for the Hunter Arms factory machinery was primarily from the race underneath the building, as was, I believe, the Ithaca Gun Co. factory.
This drawing from 1924 shows 50% of the power from steam; 50% from water

[Linked Image from photos.smugmug.com]

In 1896 the factory also had a "300-light dynamo, which lights the factory in the evening when the men are working overtime."