Misc. Website Items 2013 LLA Reserve Study | Page 9

be expected. Recently, the Association experienced a sinkhole in
Eaglehead Drive related to the collapse of a large stormwater pipe at a
significant depth. We believe it would be prudent to perform inspections
on a regular basis of similar facilities within the community in order to
avoid possible similar problems in the future.
Within the reserve study we also included a line item for swale repair
throughout the entire community of $100,000 per year to cover costs of
removing sediment and debris from roadside swales and repairing erosion
damage to off-road swales and channels.
5.2 Ponds, Lakes, Dams &
Embankments
Description

Evaluation &
Recommendations

There are four large lakes and a smaller pond located within the
jurisdiction of the Lake Linganore Association. The lakes are, from west
to east: Lake Linganore, Lake Marion, Lake Merle, and Lake Anita
Louise. The pond is known as Pinehurst Pond and is located south of
Lake Anita Louise. All have earthen dams associated with them, as well
as inlet structures and pipes. Lake Linganore is the largest lake and also
has a concrete spillway, wingwalls and a stilling basin. The earthen dams
are typically covered with a maintained lawn and landscaping. Many of
the embankments have trails along the top of the slope. Lake Marion and
Lake Merle also have roadways running along the top of the dam
embankment.
Some rip-rap stabilization is also used on the
embankments.
We performed a visual inspection of the four large lake embankments and
the embankments associated with Pinehurst Pond on July 9-10, 2013. We
found all the embankments to be in good visual condition. The concrete
inlet structures appeared to be in good condition. The downstream outlet
culverts were in good condition.
The Lake Linganore dam and concrete spillway was constructed in the
early 1970’s. It appears that the other lakes and Pinehurst Pond were also
constructed during that time period. The Lake Linganore spillway was
rehabilitated in 2002-2003 and the intake was worked on in 1998. Work
on the Lake Anita Louise embankment was done in 1992. No other
information was provided regarding recent construction or rehabilitation
work on the lakes or pond.
It should be noted that it was beyond the scope of our study to perform
comprehensive engineering evaluations of the dam embankments and
associated structures as normally done for Maryland Dam Safety
Regulation purposes.
The Maryland Dam Safety Manual was developed and published by the
Maryland Department of the Environment, Water Management
Administration, Dam Safety Division, latest edition 1996, revised
November 2003. This manual should be consulted for operation,
maintenance, and permitting of all the dams.
Although failure of the dam embankments is unlikely, especially given

Lake Linganore
New Market, Maryland
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