Aspen prepared the EIR for the Diablo Canyon Nuclear Power Plant (DCPP) Steam Generator Replacement Project. The CPUC, as the lead agency for this project, must decide whether the project cost of over $800 million should be covered by PG&E's rate-payers. For the nuclear power plant to continue operation, replacement of the original steam generators is needed because of premature degradation from stress and corrosion cracking. Project activities would involve a large workforce at the remote coastal plant in central San Luis Obispo County and delivering massive replacement steam generators by barge. Major issues of concern included impacts to San Luis Harbor and potential inconsistencies with the California Coastal Act.