The construction of the Jackman Hydro Facility by PSNH in 1926 included the formation of the Franklin Pierce Reservoir and acquisition of appropriate Flowage Rights over adjoining property. This chart, which evolved from earlier similar examples, is used as a seasonal guide to control the level of the reservoir to maximize renewable hydro generation and prevent overtopping due to spring rains and snow melt while attempting to accomodate the recreational benefits the reservoir provides..
Actual pond level varies from this ideal due to weather conditions,operation and maintenance considerations. For instance, very wet conditions will actually be reflected by higher than usual reservoir levels and earlier drawdowns may be necessary to facilitate dam repair. The company endeavors to follow this as a seasonal guide, but makes no representation that the chart will describe actual pond level at any point in any particular season for reasons noted above.