The board shall have the power and it shall be its duty to adopt a seal of the district, to manage and conduct the business affairs of the district, to employ and appoint such agents, engineers, attorneys, officers and employees as may be necessary, and prescribe their duties, to establish reasonable bylaws, rules and regulations for the government and management of affairs of the district, and generally to perform any and all acts necessary to carry out the purpose of the district organization.
RCW 86.09.268