This technical note presents preliminary estimates for the excavation forces required across  defined lunar regolith zones L1 through L5. These estimates are grounded in established  terrestrial excavation principles, including tool-soil interaction mechanics, cutting  resistance behavior, and empirical force ranges observed in granular and fractured  geomaterials. However, these terrestrial models have been carefully adapted to account for  the unique environmental constraints of the lunar surface, namely: vacuum conditions,  reduced gravitational acceleration (~1/6g), and the well-documented electrostatic  properties of fine regulates.