The state engineer is authorized to investigate the water supply available for state lands, by drilling or digging wells or otherwise as he may deem best, in order to determine the location of permanent water reservoirs for irrigation purposes, and to employ the necessary assistance or to let contracts therefor. The sums heretofore appropriated for such purposes out of the water reservoirs for irrigation purposes income fund shall be paid out on warrants of the secretary of finance and administration, supported by vouchers signed by the state engineer.
NMS § 19-5-4