Question: The Cullasaja River is a short river that flows from Lake Sequoyah which is fed by Mirror Lake and other creeks and streams originating on the western side of the demarcation of two watersheds of what?

Context paragraphs:
Mirror Lake (Tuftonboro, New Hampshire): Mirror Lake is a 333 acre water body located in Carroll County in the Lakes Region of central New Hampshire, United States, in the town of Tuftonboro.  The lake connects by a short outlet stream (not navigable) to Lake Winnipesaukee.  The resort community of Mirror Lake, a village in the town of Tuftonboro, occupies the lake's western shore.

Eastern Continental Divide: The Eastern Continental Divide (ECD) or Appalachian Divide or Eastern Divide, in conjunction with other continental divides of North America, demarcates two watersheds of the Atlantic Ocean: the Gulf of Mexico watershed and the Atlantic Seaboard watershed.  As can be readily seen from the first map at the right, the Gulf watershed demarcated by the Great Divide in red begins along the spine of the mountains of Central America and runs through the American Rockies where is terminates in the triple divide at Triple Divide Peak in Glacier National Park along the U.S.-Canadian border where the Laurentian Divide blocks the waters from traveling south to the Gulf of Mexico.

Hightown, Virginia: Hightown is an unincorporated community at the crossroads of U.S. Route 250 and Virginia State Route 640 in Highland County, Virginia, United States.  Hightown is located approximately 3 mi northwest of Monterey, Virginia.  The community lies on the division of the James River and Potomac River watersheds, with the main source of the South Branch Potomac River to the north of Hightown along State Route 640 and the source of the Jackson River, a tributary of the James, south of U.S. Route 250 west of Hightown.  The roof of a barn owned by Jacob Hevener located near Hightown is said to have divided the two watersheds, with rain falling on one side of the roof flowing to the James and on the other to the Potomac.  The community was originally known as Heveners Store.

Lake Waccamaw: Lake Waccamaw is a unique fresh water lake located in Columbus County in North Carolina.  The lake is oval in shape measuring roughly 5.2 mi by 3.5 mi covering 8938 acre surface area with an average depth of 7.5 ft and a shoreline of about 14 mi .  The marginal 70% of the lake bottom is composed of clear sand, whereas the central 30% is overlaid with a deposit of fibrous and pulpy peat.  The lake is fed by four creeks: First, Second, Third, and Big Creeks.  The lake outlet forms the Waccamaw River which flows southeasterly to empty into the Atlantic Ocean near Georgetown, South Carolina

Mirror Lake (Lake Placid): Mirror Lake, a figure-eight-shaped lake, has a surface area of 93.15 acre .  This lake is on the south edge of the city of Lake Placid, Florida.  The area immediately surrounding it is mostly rural, but there are housing developments abutting the lake on part of its south side.  Mirror Lake Drive runs just south of the lake and just south of that is Lake Placid, a much larger lake.

Hofreistæ: Hofreistæ is a lake in the municipality of Bjerkreim in Rogaland county, Norway.  The 2.66 km2 lake immediately south of the village of Øvrebygd.  The lake is fed by a short river from the lakes Austrumdalsvatnet and Byrkjelandsvatnet.  The river Hofreistæåna flows south out of this lake and eventually feeds into the river Bjerkreimselva.

Spring creek: A spring creek is a type of free flowing river whose name derives from its origin: an underground spring or set of springs which produces sufficient water to consistently feed a unique river.  The water flowing in a spring creek may additionally be fed by snow pack or rain run-off, as in most traditional free-flowing rivers, but often the entire water source for a spring creek is an aquifer or other underground water source.  For this reason, spring creeks are often filled with very pure, clean water and also demonstrate water flows that are smooth, consistent, and unwavering throughout the seasons of the year - unlike rivers filled with run-off or spring and summer melt-off from snow pack, whose water flows, water clarity, and water conditions often vary highly over the course of the year.  In addition, water temperatures in spring creeks tend to vary less throughout the seasons of the year than traditional creeks and rivers because they are fed by underground water sources.  Because of the depths of these water sources, spring creeks often emerge from their source or headwaters very cold and stay that way over the length of their runs.  In addition, due to the consistent water flows and the fact that spring creek water is "pushed" by the force of pressure from the source rather than "pulled" by the force of gravity downhill, spring creeks can flow through very flat sections of land with minimal depths over grades that might not sustain run-off creeks and rivers.  In these low-grade or flat sections of spring creeks, water flows can appear almost laminar with the surface of the creek appearing to be nearly flat and without the prominent riffles and surface disturbances caused by more rough or uneven surface bottoms found below free-stone run-off creeks and rivers surfaces.

Lake Erie Basin: Lake Erie Basin consists of Lake Erie and surrounding watersheds, which are typically named after the river, creek, or stream that provides drainage into the lake.  The watersheds are located in the states of Indiana, Michigan, New York, Ohio, and Pennsylvania in the United States, and in the Province of Ontario in Canada.  The basin is part of the Great Lakes Basin and Saint Lawrence River Watershed, which feeds into the Atlantic Ocean.  80% of the lake's water flows in from the Detroit River, with only 9% coming from all of the remaining watersheds combined.  (The remainder (11%) is derived from direct precipitation into the lake.)  A littoral zone serves as the interface between land and lake, being that portion of the basin where the lake is less than 15 ft in depth.

Brule Glacial Spillway State Natural Area: Brule Glacial Spillway is a Wisconsin Department of Natural Resources-designated State Natural Area that encompasses the valley of the upper reaches of the Bois Brule River.  This valley was carved by the outlet of Glacial Lake Duluth, which occupied what is now the western portion of Lake Superior, during the retreat of the Superior lobe of Wisconsin glaciation.  This outlet flowed southwestward through the valley, to what is now the St. Croix River.  As the glacier melted, and the level of Lake Superior dropped, the direction of flow shifted to its present northeastward course, towards Lake Superior.  A high point in a vast bog near Solon Springs marks the divide between the watersheds of the Gulf of Mexico and the Atlantic Ocean.  This divide was used for thousands of years, by Native Americans, European explorers, fur traders, and settlers as a portage between the two watersheds.

Cullasaja River: The Cullasaja River is a short river located entirely in Macon County, North Carolina.  It is a tributary of the Little Tennessee River (and in turn the Tennessee River, Ohio River and Mississippi River), into which it flows near the county seat of Franklin.  It originates to the southeast, near Highlands, the county's only other town.  It flows from Lake Sequoyah, which is fed by Mirror Lake and other creeks and streams originating on the western side of the Eastern Continental Divide, which runs through the east side of Highlands.

Supporting paragraphs: Cullasaja River Eastern Continental Divide
Answer: the Atlantic Ocean