Authorizes the creation of beach management districts.

Provides that beach management districts addressing the control and removal of aquatic plants or vegetation must develop a plan for this activity, in consultation with appropriate federal, state, and local agencies. The plan must include an element addressing nutrient loading from land use activities in the subbasin that is tributary to the area targeted for management, and be consistent with the action agenda approved by the Puget Sound partnership, where applicable.

Requires the department of ecology, subject to the availability of amounts appropriated for this specific purpose, to provide technical assistance to community groups and county and city legislative authorities requesting assistance with the development of beach management programs and to develop a study and work plan to address the problem of sea lettuce growth and proliferation in Puget Sound.