Complex sentence: Upper Pine Bottom Run was the site of a furnace for pig iron in 1814, the first sawmill was built on it in 1815, and in 1825 an earlier bridle path across its headwaters became a turnpike.
Split into simpler sentences: Upper Pine Bottom Run was the site of a furnace for pig iron in 1814. The first sawmill was built on it in 1815, and in 1825 an earlier bridle path across its headwaters became a turnpike.