Haw. Rev. Stat. § 273-5: Width of land taken.

The lands to be taken or used for the line of any railway lawfully authorized, shall not exceed one hundred feet in width, except where greater width is necessary for engines or carriages to turn, stand in, or pass each other, or for stations, or for raising embankments, or for crossing valleys or low grades, or for cutting through high grounds, or for the erection or establishment of any fixed or permanent wharf, warehouse, tollhouse, machinery, or other building or erection, or for excavating, removing, or depositing earth or other material.