View a user guide for the the National Electric Energy Data System (NEEDS), the database of existing and planned-committed units which are modeled in the EPA Base Case v.4.10. View IPM Base Case v.4.10 for related information.
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- NEEDS v.4.10 User Guide (PDF)(11 pp, 180 K)