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General Edgar Jadwin Dam Overview

The General Edgar Jadwin Dam project is part of an integrated reservoir flood risk management system with the Prompton Lake project. Jadwin Dam is located on Dyberry Creek north of the borough of Honesdale in Wayne County, Pennsylvania. The dam is situated approximately 2.9 miles upstream of the confluence of Dyberry Creek and the Lackawaxen River. Honesdale is centered near this confluence. 

Jadwin is a dry dam that maintains no pool during normal operation. The dam can provide 24,500 acre-feet of storage to the spillway crest and a total of 47,300 acre-feet of storage at maximum pool. The dam controls 64.5 square miles of the Dyberry Creek watershed in Wayne County. 

Construction began in May 1957, diversion of the Dyberry Creek started in June 1957 and the dam was dedicated in June 1959. Jadwin Dam has prevented approximately $32 million in flood damages since its construction. 

Jadwin Dam Safety Modification Study

Dams reduce, but do not eliminate the risks associated with flood events. A fully-functioning dam could be overtopped when a rare, large flood occurs, or a dam could breach because of a deficiency - both of these possibilities pose risk of property damage and life loss. To manage these risks USACE has a routine program that inspects and monitors its dams regularly.  USACE implements short and long term actions, on a prioritized basis, when unacceptable risks are found at any of its dams.

Based upon the most recent risk assessment in 2016, Jadwin Dam is considered to have a higher risk primarily due to the potential for internal erosion in the embankment during a significant flooding event. 

As a result of this finding, USACE has implemented a number of measures to reduce risk in the interim, including increasing inspections and monitoring. USACE has also begun the Jadwin Dam Safety Modification Study. This multi-year effort will further identify and recommend a risk management plan that supports the expeditious and cost effective reduction of the identified potential for embankment failure. This process will involve public comment opportunities regarding the various alternatives considered during the study. This webpage will serve as a resource and include updates on informational meetings and other comment opportunities. 

Jadwin Photos

Contact

U.S. Army Corps of Engineers
Philadelphia District
215-656-6432
Email