Battle of Beaver Dam Creek Battle of Beaver Dam Creek The Battle of Beaver Dam Creek, also known as the Battle of Mechanicsville or Ellerson's Mill, took place on June 26, 1862, in Hanover County, Virginia, as the first major engagement of the Seven Days Battles during the Peninsula Campaign of the American Civil War. It was the start of Confederate General Robert E. Lee's counter-offensive against the Union Army of the Potomac, under Maj. Gen. George B. McClellan, which threatened the Confederate capital of Richmond. Lee attempted to turn the Union right flank, north of the Chickahominy River, with troops under Maj. Gen. Thomas
Cabin John Creek Canal and empties into the Potomac. The Cabin John Creek watershed is highly developed, and as a result the water quality in the creek main stem and several tributaries is degraded. Montgomery County Government is implementing a long-term plan to improve water quality throughout the area, including stormwater management and stream restoration projects. Cabin John Creek Cabin John Creek is a tributary stream of the Potomac River in Montgomery County, Maryland. The watershed covers an area of . The headwaters of the creek originate in the city of Rockville, and the creek flows southward for to the Potomac River. The