In 1869, the Chatham Railroad, connecting Chatham County with Raleigh, was completed. At the highest point of the line, which railroad workers dubbed the "apex of the grade", existed a pond. Trains leaving out of Chatham would stop at the pond to replenish their water. A community began to grow around the stop, which the railroad workers called Apex.[8] The town of Apex was incorporated in 1873.[9] The pond was eventually drained by culverts and ceased to exist by 1900.[8]