The General Edgar Jadwin Dam and Reservoir is part of an integrated flood risk management system with the Prompton Lake project, both managed by the U.S. Army Corps of Engineers' Philadelphia District. Located on Dyberry Creek about 3 miles north of its confluence with the Lackawaxen River and the Borough of Honesdale in Wayne County, Pennsylvania, Jadwin is a dry dam that maintains no pool during normal operation and reserves its entire reservoir capacity for flood control, the project's only authorized purpose. It temporarily holds back water exceeding the outlet works' flow capacity and releases it gradually to prevent bank overflow. The dam provides 24,500 acre-feet of storage to the spillway crest, equal to 7.1 inches of runoff from the drainage area above the dam, and 47,300 acre-feet at maximum pool, controlling 64.5 square miles of the Dyberry Creek watershed. Construction began in May 1957, Dyberry Creek was diverted in June 1957, and the dam was dedicated in June 1959. As of September 2020, it had prevented an estimated $36.6 million in flood damages since construction, and together with Prompton Dam, which began operating in 1960, had prevented a combined $65.7 million in damages within the Lackawaxen River Sub-basin and the Delaware River Basin. The dam honors Lieutenant General Edgar B. Jadwin, born in Honesdale, Pennsylvania, on August 7, 1865, to Cornelius and Charlotte Wood Jadwin. After attending Lafayette College, he graduated first in his class from West Point in 1890 and was commissioned in the Corps of Engineers. He served with engineer troop units from 1891 to 1895, was lieutenant colonel of the 3d U.S. Volunteer Engineers in the Spanish-American War, and worked on the enlargement of Ellis Island, the breakwater at San Pedro, California, and the reconstruction of the jetties at Galveston, Texas. After serving as district engineer at the growing ports of Los Angeles and Galveston, he was chosen by General Goethals to assist in constructing the Panama Canal. From 1911 to 1916 he served in the Office of the Chief of Engineers on bridge and road matters. After the United States entered World War I in 1917, he recruited the 15th Engineers, led the railway construction regiment to France, directed American construction and forestry work there for a year, and received the Distinguished Service Medal. President Wilson appointed him in 1919 to investigate conditions in Poland. In 1922 to 1924 he headed the Corps' Charleston District and Southeast Division, then served two years as Assistant Chief of Engineers. As Chief of Engineers, he sponsored the Mississippi River flood control plan adopted by Congress in May 1928. He retired as a lieutenant general on August 7, 1929, became chairman of the Federal Power Commission in 1930, and died at Gorgas Hospital in the Canal Zone on March 2, 1931, before burial in Arlington National Cemetery with full military honors.