An appropriator who is authorized to construct a dam or reservoir is granted the right-of-way, not to exceed 100 feet wide, and the necessary area for the site, over any public school land, university land, or asylum land of this state and the use of the rock, gravel, and timber on the site and right-of-way for construction purposes, after paying compensation as determined by the commission. An appropriator may acquire the reservoir site and rights-of-way over private land by contract.