This Guide Book estimates the socioeconomic impacts of the Pilgrim Nuclear Power Station (“Pilgrim Station”) on the Town of Plymouth, the Old Colony Planning Council (OCPC), and neighboring cities and towns. It does not endorse any perspective for or against nuclear power, focusing only on the impacts of Pilgrim Station’s operations and the impacts of decommissioning should it occur. The plant’s direct impacts are identified first, followed by estimates of secondary impacts that come from the business and household spending caused by Pilgrim Station’s expenditures. The Guide Book then estimates the impacts Pilgrim Station’s closure would have on Plymouth and broader economies, and concludes with recommendations for the town and region.