Devil's Backbone Dam Rehabilitation - Boonsboro, Maryland
Posted by: 
BruceS
N 39° 32.324 W 077° 42.626
18S E 267072 N 4380071
Marker giving history of mill dam and its rehabilitation at Devil's Backbone County Park near Boonsboro, Maryland.
Waymark Code: WMKGDY
Location: Maryland, United States
Date Posted: 04/11/2014
Views: 5
Text of marker:
Devil's Backbone Dam Rehabilitation
Devil's Backbone Dam appears to be one of the few remaining original dams from the height of Washington County's flour production days of the early 19th century and representative example of masonry dams that predate the Civil War. According to census records, there was a large commercial mill operating at this location from the 1820s though the 1890s.
In 1916, the Antietam Electric Light and Power Company purchased the land. This company along with Maryland Light and Power and finally Potomac Edison Company appear to all have used this parcel of land as a small electric power generation station and likely harnessed the existing dame with some modifications for their operations. It is highly probable that during this period the the original two foot concrete cap was placed atop the masonry dam. Having abandoned power generation at this location Potomac Edison donated the lad to the Board of County Commissioners of Washington County, MD who soon created a park that opened June 26, 1966.
In the 1990s, the dam began to show signs of deterioration and areas of missing stones were discovered. An in depth inspection and analysis performed in 2001 indicated that corrective action should be taken to stabilize the structure. Later that year the County commissioners began to coordinate with the Maryland Department of Environment, Dam Safety Division to develop a remediation scope of work. Over the next several years, three structural options (rehabilitation, partial dam breach, or complete removal) were evaluated by the County Commissioners with input from the community, Maryland Department of Environment and Maryland Historical Trust. In 2010, the County Commissioners made the decision to rehabilitate the dam. The design was completed in early 2011 by Wallace, Montgomery and Associates of Towson, MD and a construction contract was awarded to C William Hetzer, Inc. of Hagerstown, MD and for $1.5 million. Construction started in June 2011 and was completed in December, 2011. Additional park improvements included stabilizing eroding stream banks along Lappans Road, and improving stream access and recreational opportunities. The project of was funded by the State of Maryland and the County Commissioners and managed by the Washington County Division of Public Works.