Complex sentence: At its peak the Hazard Powder Company operated in 125 buildings occupying hundreds of acres of land with 25 water wheels and three steam engines along a mile of Scantic River frontage.
Split into simpler sentences: At its peak the Hazard Powder Company operated in 125 buildings occupying hundreds of acres of land. It had 25 water wheels and three steam engines along a mile of Scantic River frontage.