To meet the growing needs for potable water in the Boston metropolitan region, the Massachusetts state legislature ordered the evacuation of the relatively sparsely populated towns of Dana, Enfield, Greenwich, and Prescott, as well as portions of other adjoining towns such as New Salem, to make way for the construction of a massive reservoir. Over the course of almost two decades, the population of the towns was systematically relocated, the houses moved or razed, and bed of the future reservoir was stripped of trees and brush. The last remaining residents of the region were removed in 1938 and the four primary towns were officially disincorporated as the dam was completed and the waters began to rise.

The numbered blueprint sheets and index that make up this collection offer a detailed depiction of the Swift River Valley towns at the time the state government was seizing land for the Quabbin Reservoir. Apparently surveyed between 1932 and 1938, the maps were prepared by the Metropolitan District Commission of the Commonwealth of Massachusetts for a Quabbin Reservoir Real Estate Survey in 1959 and then revised in 1972.