Are both the Riverside Canal and the Dismal Swamp Canal located in the United States?
yes
Riverside Canal (El Paso)
The Riverside Canal is an irrigation canal in El Paso County beginning southeast of El Paso, Texas.
 The canal acquires water from the Riverside Diversion Dam on the Rio Grande 15 mi southeast of El Paso.
 The canal is managed by the US Bureau of Reclamation.
 The canal extends for 17.2 mi with a capacity of 900 cubic feet per second.
 Water from the canal irrigates about 39,000 acres (160 km²).
 The canal and diversion dam is the southernmost system on an irrigation project extending along the Rio Grande in New Mexico and Texas.
 The canal supplies a canal network extending throughout the Upper Rio Grande Valley.
Dismal Swamp Canal
The Dismal Swamp Canal is located along the eastern edge of the Great Dismal Swamp in Virginia and North Carolina in the United States.
 It is the oldest continually operating man-made canal in the United States, opened in 1805, and closed in October 2016.
 It is part of the Intracoastal Waterway, an inland route, which parallels the east coast and offers boaters shelter from the Atlantic Ocean from Manasquan Inlet, New Jersey, to Brownsville, Texas.
 The route runs through bays, lakes, rivers, streams, and canals, and includes the Intracoastal Waterway running from Norfolk, Virginia, to the Florida Keys.
Great Dismal Swamp National Wildlife Refuge
The Great Dismal Swamp National Wildlife Refuge was created in 1974 to help protect and preserve a portion of the Great Dismal Swamp, a marshy region on the Coastal Plain of southeastern Virginia and northeastern North Carolina between Norfolk, Virginia, and Elizabeth City, North Carolina in the United States.
 It is located in parts of the independent cities of Chesapeake and Suffolk in Virginia, and the counties of Camden, Gates, and Pasquotank in North Carolina. Wallaceton (Chesapeake, Virginia)
Wallaceton is a historic home located at Chesapeake, Virginia.
 The original section was built between 1853 and 1863, as a company store.
 It was expanded after the American Civil War.
 It is a 1 1/2-story, rectangular, Greek Revival style frame dwelling.
 It has flat corner pilasters, a heavy box cornice under the eaves, and a full width front porch.
 Also on the property are a contributing two-room kitchen building and a dairy.
 About 1910, it was relocated approximately 100 feet to the east of the Dismal Swamp Canal to remove it from canal property.
 It was named for John Gallaudet Wallace (1840-1910) a farmer and businessman who fought in the Civil War for the Confederacy, as a Captain of Company C, 61st Virginia Volunteer Infantry Regiment. Moses Grandy
Moses Grandy (  1786 - unknown), was an African-American author, abolitionist, and, for more than the first four decades of his life, an enslaved person.
 At eight years of age he became the property of his playmate, James Grandy and two years later he was hired out for work.
 The monies Moses earned were collected and held until James Grandy turned 21.
 Grandy helped build the Great Dismal Swamp Canal and learned how to navigate boats.
 It was that skill that led him to be made commander of several boats that traveled the canal and Pasquotank River, transporting merchandise from Elizabeth City, North Carolina to Norfolk, Virginia.
 The position allowed him to be better fed, shod and dressed.
 Able to keep a portion of his earnings, Grandy arranged to buy his freedom twice and twice his owners kept the money and held him in slavery.
 An arrangement was made for an honorable man to buy him and Grandy earned the money to buy his freedom a third time, this time successfully. Pungo River
The Pungo River is a river in eastern North Carolina, United States.
 It originally began in the Great Dismal Swamp in Washington County, North Carolina; the upper part of the river has since been supplanted by the Pungo River Canal, dug in the 1950s to improve drainage of local farmland.
 The river flows southeast and forms part of the boundary between Beaufort County and Hyde County.
 The river then widens dramatically, turns west, and flows past Belhaven, North Carolina before joining the Pamlico River near Pamlico Sound. Nansemond National Wildlife Refuge
The Nansemond National Wildlife Refuge is a National Wildlife Refuge of the United States located along the Nansemond River in Suffolk, Virginia.
 It is managed by the United States Fish and Wildlife Service as a satellite of Great Dismal Swamp National Wildlife Refuge.
 In 1973 about 207 acre of salt marsh were transferred to the Service by the United States Navy to form the refuge.
 An additional 204 acre were transferred in 1999. Riverside Diversion Dam
The Riverside Diversion Dam (or simply the Riverside Dam) was a diversion dam on the Rio Grande to the southeast of El Paso, Texas.
 The dam was owned by the United States Bureau of Reclamation, and diverted water into the Riverside Canal for use in irrigation in the El Paso Valley. Bower's Hill, Virginia
Bower's Hill is a community located in the independent city of Chesapeake, Virginia (formerly Norfolk County) in the United States.
 It is located in the South Hampton Roads region at the northeastern edge of the Great Dismal Swamp, an area consisting of generally low-lying sandy terrain of the coastal plain. Dismal Swamp State Park
Dismal Swamp State Park is a North Carolina state park in Camden County, North Carolina in the United States.
 The park was created as a state natural area in 1974 with the help of The Nature Conservancy, and on July 28, 2007 the NC General Assembly re-designated it as a state park.
 It opened to the public in 2008.
 This marked the first time that public access to Great Dismal Swamp was made possible in North Carolina.
 The park covers 14432 acre of protected land on the North Carolina/Virginia border.
 Park offices are three miles (5 km) south of the border on U.S. Route 17 near South Mills.
 Features of the park include the canal which is used regularly by boaters using the Intracoastal Waterway and several miles of hiking and biking trails.