It is hereby declared to be the public policy of the legislature of the state of Washington, that it is in the public interest to employ the power of eminent domain and advance and expend public moneys for the purposes herein contained, and to provide for means by which marginal area properties may be developed or redeveloped in accordance with the legislative policies hereinafter stated:

(1) A sound development of the economic security of the peoples of the state of Washington is dependent upon proper development and redevelopment of marginal properties, and the general welfare of the inhabitants of the port districts in which they exist require the remedying of such injurious conditions marginal properties are now subjected to.

(2) The development and redevelopment of such marginal area properties cannot be accomplished by private enterprise alone without public participation and assistance in the acquisition of land and planning and in the financing of land assembly in the work of clearance, development and redevelopment, and in the making of improvements necessary therefor.

(3) To protect and promote sound development and redevelopment of marginal lands as hereinafter defined, and the general welfare of the inhabitants of the port districts in which they exist, to remedying such injurious conditions through the employment of all appropriate means.

(4) That whenever the development or redevelopment of such marginal lands cannot be accomplished by private enterprise alone, without public participation and assistance in the acquisition of land and planning and in financing of land assembly in the work of clearance, development and redevelopment, and in the making of improvements necessary therefor, it is in the public interest to employ the power of eminent domain, to advance and expend public moneys for those purposes, and to provide for means by which such marginal lands may be developed or redeveloped.

(5) That the development or redevelopment of such marginal lands and the provision of appropriate continuing land use constitute public uses and purposes for which public moneys may be advanced or expended and private property acquired, and are governmental functions and are of state concern in the interest of health, safety and welfare of the state of Washington, and of the communities in which such areas exist.

(6) That the necessity in the public interest for the provision of this chapter is declared to be a matter of legislative determination.