RCW 86.09.720: Cooperative watershed management.

In addition to the authority provided in this chapter, flood control districts may participate in and expend revenue on cooperative watershed management arrangements and actions, including without limitation those under chapter 39.34 RCW, under chapter 39.106 RCW, and under other intergovernmental agreements authorized by law, for purposes of water supply, water quality, and water resource and habitat protection and management.