Question: Which national forest (apart from the Pisgah National Forest) does this river, of which Spring Creek is a tributary stream, drain?

Context paragraphs:
Pisgah National Forest: Pisgah National Forest is a National Forest in the Appalachian Mountains of western North Carolina.  It is administered by the United States Forest Service, part of the United States Department of Agriculture.  The Pisgah National Forest is completely contained within the state of North Carolina.  The forest is managed together with the other three North Carolina National Forests (Croatan, Nantahala, and Uwharrie) from common headquarters in Asheville, North Carolina.  There are local ranger district offices located in Pisgah Forest, Mars Hill, and Nebo.

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.

Cedar Creek (Missouri River): Cedar Creek is a stream in Boone and Callaway counties of the U.S. state of Missouri.  It is a tributary of the Missouri River.  The headwaters of Cedar Creek are in northeast Boone County about five miles east of Hallsville and one mile west of the Audrain-Boone county line.  The stream flows south and about five miles south of its headwaters the stream becomes the boundary between Boone and Callaway counties.  The stream crosses under Interstate 70 about eight miles east of Columbia and enters the Mark Twain National Forest.  The stream flows south to southwest through the national forest and upon leaving the forest turns to the east and ceases to be the county line.  The stream flows east for about one mile then turns south and flows under U. S. Route 63 and into the Missouri River four miles northwest of Cedar City and across the river from Jefferson City.  The Katy Trail crosses Cedar Creek just north of its confluence with the Missouri.

Spring Creek, Madison County, North Carolina: Spring Creek is a tributary stream of the French Broad River in Madison County, North Carolina with a length of approximately 17 miles.  It flows in much of its lower course through a section of the Pisgah National Forest and passes the communities of Trust, Luck, and Joe.  It joins the French Broad river in Hot Springs, North Carolina.

Turtleback Falls: Turtleback Falls, also called Umbrella Falls, is a waterfall in Western North Carolina, located near Brevard.  The falls is located on the Horsepasture River in the Pisgah National Forest.  The falls is usually accessed by a hike starting in Gorges State Park which passes through Pisgah National Forest property.

Spring Creek Reservoir (California): The Spring Creek Reservoir is the artificial lake created by the construction of the Spring Creek Dam across Spring Creek in the Shasta-Trinity National Forest of Shasta County, California, adjacent to Keswick.

Cache National Forest: Cache National Forest is a 533,840-acre area of National Forest System land in Idaho and Utah which was established on July 1, 1908 by the U.S. Forest Service.  The majority of its area is in Utah, and was initially created when the Bear River National Forest was disbanded.  On July 1, 1915, all of Pocatello National Forest was added.  In 1973 the Idaho portion was transferred to the administration of Caribou National Forest, while the Utah portion was combined administratively with Wasatch National Forest, creating the Wasatch-Cache National Forest.  In descending order of forestland area, the Cache National Forest portion is located in Cache, Bear Lake, Franklin, Weber, Rich, Box Elder, Caribou, and Morgan counties.  (Bear Lake, Franklin, and Caribou counties are in Idaho, and the rest in Utah.)  The forest has a current area of 701453 acre , which comprises 43.56% of the combined Wasatch-Cache's total acreage.  The forest is administered from Salt Lake City, Utah as part of the Wasatch-Cache National Forest, but there are local ranger district offices in Logan and Ogden.  From circa 1911 until August 1923, the area was roamed by Old Ephraim.

Spring Creek Dam: Spring Creek Debris Dam is an earthfill dam on Spring Creek, a tributary of the Sacramento River, in Shasta County in the U.S. state of California.  Completed in 1963, the dam, maintained by the U.S. Bureau of Reclamation, serves primarily to collect severe acid mine drainage stemming from the Iron Mountain Mine.  The dam forms the Spring Creek Reservoir, less than 1 mi long.  Spring Creek and South Fork Spring Creek flow into the reservoir from a 16 sqmi watershed.  The dam is directly upstream from the city of Keswick, California and the Keswick Reservoir.

French Broad River: The French Broad River flows 218 mi from near the town of Rosman in Transylvania County, North Carolina, into the state of Tennessee.  Its confluence with the Holston River at Knoxville is the beginning of the Tennessee River.  The river flows through the counties of Transylvania, Buncombe, Henderson, and Madison in North Carolina, and Cocke, Jefferson, Sevier, and Knox in Tennessee, and drains large portions of the Pisgah National Forest and the Cherokee National Forest.

Mills River (North Carolina): The Mills River is located in Transylvania and Henderson counties, North Carolina, United States is a tributary of the French Broad River.  The river flows out of the Pisgah Ranger District of the Pisgah National Forest in two forks: the North Fork, which drains the slopes just south of the Blue Ridge Parkway between Asheville and Mount Pisgah, and the South Fork, which drains the area of the Pisgah Ranger District just east of the Cradle of Forestry in America, including the slopes of Black Mountain.  The Mills River flows into the French Broad River northwest of Hendersonville between NC 191 and Interstate 26.

Supporting paragraphs: Spring Creek, Madison County, North Carolina French Broad River
Answer: Cherokee National Forest