It is hereby declared as a matter of legislative determination that providing counties and cities, towns and villages constituting county seats in the state of New Mexico with the purposes, powers and duties, rights, privileges and immunities provided in this act [5-5-1 to 5-5-23, 5-5-25 to 5-5-27 N.M. Stat. Ann.] will serve a public use and will promote the health, safety, prosperity, security and general welfare of the inhabitants thereof and of the state of New Mexico; and that the acquisition, improvement, equipment, maintenance and operation of any project herein authorized is in the public interest and constitutes a part of the established and permanent policy of the state of New Mexico. For the accomplishment of these purposes the provisions of this law shall be broadly construed.