Epping Dam is a 128-acre reservoir located on Stoney Creek in Williams County, North Dakota, approximately 12 miles northeast of Williston. Originally constructed as a Federal Emergency Relief Administration and Work Progress Administration project, it was completed in 1936 and was the largest earth fill dam in North Dakota at the time. The dam features approximately 6 miles of shoreline with an average depth of 12 feet and a maximum depth of around 29 feet. The reservoir offers diverse fishing opportunities and serves as a popular recreational area for both local residents and visitors, with the Williams County Park Board managing the site for public use.