Question: Which is longer Miami and Erie Canal or Folsom South Canal?
Context: The Folsom South Canal is an aqueduct in Northern California in the United States.  The canal diverts water from the American River at Nimbus Dam in Sacramento County and travels about 26.7 mi in a southerly direction, terminating near Clay, about 10 mi northeast of Lodi.  The canal is operated by the U.S. Bureau of Reclamation, as part of the Auburn-Folsom South Unit of the Central Valley Project.  It is contracted for irrigation, industrial and municipal water supply; formerly it provided cooling water for the Rancho Seco Nuclear Generating Station.  It is also connected to the Mokelumne Aqueduct, which provides a large portion of the San Francisco Bay Area's water supply. Erie Canal Lock 52 Complex is a national historic district located at Port Byron and Mentz in Cayuga County, New York.  The district includes two contributing buildings (the Erie House and the blacksmith shop / mule barn); three contributing engineering structures (Erie Canal Lock 52, culvert, and canal prism of the enlarged Erie Canal); and archaeological sites associated with the canal operations.  Lock 52 was constructed 1849-1853 as part of the Enlarged Erie Canal program.  It remained in operation until the rerouting of the canal under the New York State Barge Canal System in 1917.  The Erie House was built in 1894 and is a two story frame structure that housed a saloon and hotel. The Miami and Erie Canal was a canal in Ohio that ran about 274 mi ; it was constructed from Cincinnati to Toledo to create a water route from the Ohio River to Lake Erie.  Construction on the canal began in 1825 and was completed in 1845 at a cost to the state government of $8,062,680.07.  At its peak, it included 19 aqueducts, three guard locks, 103 canal locks, multiple feeder canals, and a few man-made water reservoirs.  The canal climbed 395 ft above Lake Erie and 513 ft above the Ohio River to reach a topographical peak called the Loramie Summit, which extended 19 mi between New Bremen, Ohio to lock 1-S in Lockington, north of Piqua, Ohio.  Boats up to 80 feet long were towed along the canal by mules, horses, or oxen walking on a prepared towpath along the bank, at a rate of four to five miles per hour. The Indiana Central Canal was a canal intended to connect the Wabash and Erie Canal to the Ohio River.  It was funded by the Mammoth Internal Improvement Act, Indiana's attempt to take part in the canal-building craze, started by the Erie Canal.  $3.5 million was allocated for the project, the largest piece of the entire $10 million Act.  However, due to the Panic of 1837, Indiana suffered financial difficulties and had to turn over the canal to the state's creditors, and building of the canal was stopped in 1839.  The canal was supposed to extend 296 mi , from Peru, Indiana, to Evansville, Indiana, where it would reach the Ohio River.  It was originally divided into two sections, North and South.  Later, a third section was designated, called the Indianapolis section.  Only eight miles were completed, with eighty additional miles between Anderson, Indiana, and Martinsville, Indiana, having been partially built. The popular song "Low Bridge, Everybody Down" was written in 1905 by Thomas S. Allen after Erie Canal barge traffic was converted from mule power to engine power, raising the speed of traffic.  Also known as "Fifteen Years on the Erie Canal", "Fifteen Miles on the Erie Canal", "Erie Canal Song", and "Mule Named Sal", the song memorializes the years from 1825 to 1880 when the mule barges made boomtowns out of Utica, Rome, Syracuse, Rochester, and Buffalo, and transformed New York into the Empire State.  The tune is sadly nostalgic. The Miami and Erie Canal Deep Cut is a preserved, 6600 ft long, segment of the Miami and Erie Canal, United States.  In order to avoid using locks to go over a ridge, the canal was dug deeply into the ridge, far more than the 5 ft depth of the canal itself.  Workers dug the canal bed up to 52 ft into the blue clay ridge that separated the St. Marys and Auglaize River watersheds.  It is a United States National Historic Landmark. Rancho Seco Recreational Park is a recreational area located in the California Central Valley near the Rancho Seco Nuclear Generating Station in Herald, California.  It is open to the public for camping, fishing, hiking and water activities.  Boats are restricted to outboard electric motors which improves the lake's use as a swimming hole.  The lake is fed by the Folsom South Canal. The Walhonding Canal was a canal in Coshocton County, Ohio that was used as a feeder canal for the Ohio and Erie Canal.  A small canal, at only 25 mi long, it was wholly contained within Coshocton County, following the Mohican River from Cavallo south to the confluence with the Kokosing River, which together with the Mohican forms the Walhonding River.  The canal followed the Walhonding River southeast toward Coshocton where it met the Ohio and Erie Canal in Roscoe Village. Schoharie Crossing State Historic Site, also known as Erie Canal National Historic Landmark, is a historic district that includes the ruins of the Erie Canal aqueduct over Schoharie Creek, and a 3.5 mi long part of the Erie Canal, in the towns of Glen and Florida within Montgomery County, New York.  It was the first part of the old canal to be designated a National Historic Landmark, prior to the designation of the entire New York State Barge Canal as a NHL in 2017. The Pennsylvania and Ohio Canal, also known as the P & O Canal, the Cross Cut Canal and the Mahoning Canal was a shipping canal which operated from 1840 until 1877 (though the canal was completely abandoned by 1872).  It was unique in that it served to connect canals in two states (the Ohio and Erie Canal in Ohio and the Beaver and Erie Canal in Pennsylvania) and was funded by private interests.
Answer: Miami and Erie Canal