In addition to other powers granted in this chapter, a district and the supervisors thereof may:
1. Manage or administer any project for the conservation of a renewable natural resource located within its boundaries undertaken by any person, municipal corporation or government.
2. Act as an agent of any person, municipal corporation or government in connection with the acquisition, construction, operation or administration of any project for the conservation of a renewable natural resource within its boundaries.
3. Accept donations, gifts and contributions in money, services, materials or any other form from any source, and use or expend such money, services, materials or other contributions in carrying on its operations.
4. Participate in cost-sharing on federally financed projects.