The mission of the Contra Costa Resource Conservation District is to facilitate conservation and stewardship of the natural resources in Contra Costa County. Through my work, I help to carry out the mission of Contra Costa RCD and facilitate conservation and stewardship of natural resources in Contra Costa County.The East Contra Costa County Habitat Conservation. 11 professional in DoDI 4715.03, Natural Resources Conservation Program. 12. 13. The objective of the Ramsar Convention is the conservation and wise use of wetlands through national action and international cooperation. Corps permits are also necessary for any work, including construction and dredging, in the Nation's navigable waters.