Complex sentence: Prior to the construction of the lake in 1928, the area had been known as Breedlove, and was the southern terminus of the Preston Railroad, which hauled logs from the surrounding mountains to the large mill in Crellin, Maryland.
Split into simpler sentences: Prior to the construction of the lake in 1928, the area had been known as Breedlove. Breedlove was the southern terminus of the Preston Railroad, which hauled timber from the surrounding mountains to a large lumber mill in Crellin, Maryland.