For the purpose of carrying out the provisions of this chapter the state reclamation revolving account, heretofore established and hereinafter called the reclamation account, shall consist of all sums appropriated thereto by the legislature; all gifts made to the state therefor and the proceeds of the sale thereof; the proceeds of the sale or redemption of and the interest earned by securities acquired with the moneys thereof; and all reimbursements for moneys advanced for the payment of assessments upon public lands of the state for the improvement thereof. Moneys in the reclamation account may be invested by the state treasurer pursuant to RCW 43.84.080.