Located directly to the south of the Muddy Branch Watershed, the Watts Branch headwaters are in the City of Rockville, and the stream parallels the Muddy Branch towards the Potomac.  This watershed does have a special protection area, which has very tight controls to protect the stream.  The location where this stream meets the Potomac is directly above the WSSC water treatment plant and the stream has a great influence on the operation of the plant and on our drinking water. Facebook