A Plan-EIS is an official environmental review document required by the Natural Resources Conservation Service (NRCS) for planning and carrying out projects under the Watershed Protection and Flood Prevention Program (also known as Public Law 83-566) and to comply with the National Environmental Policy Act (NEPA). A Plan-EIS is required for any project that applies for federal financial assistance through the NRCS Watershed Program and anticipates that the proposed project could significantly affect the quality of the human and natural environment.