In 1912, Delaware & Hudson Company / Hudson Coal Co. constructed a new breaker on the edge of Archbald. The Gravity Slope breaker and portal opened in 1913 and replaced the D&H's older White Oak Colliery that was nearby. When the breaker feed conveyor collapsed in 1942, the breaker closed and the coal was shipped to other nearby breakers (Marvine and Powderly). Production from the Gravity Slope mine ceased in the mid-1950s.