The Middlesex Canal was a 27-mile (44-kilometer) barge canal connecting the Merrimack River with the port of Boston.
 When operational it was 30 feet (9.1 m) wide, and 3 feet (0.9 m) deep, with 20 locks, each 80 feet (24 m) long and between 10 and 11 feet (3.0 and 3.4 m) wide.
 It also had 8 aqueducts.
The Lehigh and Susquehanna Railroad is a defunct railroad which operated in the state of Pennsylvania during the nineteenth and twentieth centuries.
 The company was a subsidiary of the Lehigh Coal and Navigation Company (LC&N), but for much of its lifetime leased by the Central Railroad of New Jersey.
 It was founded in 1837 to carry coal from the North Branch Division of the Pennsylvania Canal to the Lehigh Canal, but would later be extended to the Delaware River at Easton, Pennsylvania.
 It was conveyed to Conrail in 1976.
The Delaware & Lehigh Canal National and State Heritage Corridor (D&L) is a 165 mi National Heritage Area in eastern Pennsylvania in the United States.
 It stretches from north to south, across five counties and over one hundred municipalities.
 It follows the historic routes of the Lehigh and Susquehanna Railroad, Lehigh Valley Railroad, the Lehigh Navigation, Lehigh Canal, and the Delaware Canal, from Bristol (northeast of Philadelphia) to Wilkes-Barre in the northeastern part of the state.
 The backbone of the Corridor is the 165 mi D & L Trail.
 The Corridor's mission is to preserve heritage and conserve green space for public use in Bucks, Northampton, Lehigh, Carbon, and Luzerne counties in Pennsylvania.
 It also operates Hugh Moore Historical Park & Museums, which includes the National Canal Museum.
Bristol is a borough in Bucks County, Pennsylvania, 23 mi northeast of Center City Philadelphia, opposite Burlington, New Jersey on the Delaware River.
 Bristol was first incorporated in 1720 but historically, after 1834 became very important to the development of the American Industrial Revolution as the terminus city of the Delaware Canal providing greater Philadelphia with the days High Tech Anthracite fuels from the Lehigh Canal via Easton.
 The canal and a short trip on the Delaware also gave the town access to the mineral resources available in Connecticut, New Jersey and New York via each of the Morris Canal, the Delaware and Hudson Canal, and the Delaware and Raritan Canal, and connected the community to those markets and trade from New York City.
 All these factors spurred development of Bristol and nearby towns, explaining in part the industries which developed in the region.
Mountain Top yard or Penobscot yard is a rail yard in Mountain Top, Pennsylvania.
 It was built by the Lehigh Coal & Navigation Company (LC&N) in response to an 1837 bill authorizing a right of way and was established by 1840, at least as a construction camp for the Ashley Planes, in support of the construction of the Lehigh and Susquehanna Railroad trackage and operations to join the northern Anthracite Coal Region from barge loading docks along the Susquehanna (above and below the Navigations of the Pennsylvania Canal) in Pittston in the Wyoming Valley with the Lehigh Canal.
Penobscot Knob, also Penobscot Mountain, is a summit located in the western fringe of the Poconos nearest to Mountain Top, Pennsylvania which in the Solomon Gap pass below it lies an important multi-modal transportation corridor.
 At one time before incorporation, Mountain Top and the saddle of the pass was known by the Amerindian name Penobscot.
 Penobscot Mountain forms part of the drainage divide between the Lehigh Valley & greater Delaware River drainage basin and the Wyoming and Susquehanna Valley, part of the Potomac River drainage basin.
 The pass formed between Penobscot and Haystack Mountain a few thousand feet to the West was one of the few places a railroad could be envisioned in the 1830s when the fuel crises in eastern cities demanded easier transportation to the Northern Anthracite Coal Fields, which ironically, came to be exploited by the company with a near monopoly in providing coal from the Southern Anthracite region, Lehigh Coal & Navigation Company (LC&N, f.1821), which had built both the Lehigh Canal, but also the nation's second railway, the Summit Hill & Mauch Chunk Railroad.
 The whole uplands north and west faces over look the Wyoming Valley from the southeastern corner near Hazleton towards and through the greater south Wilkes-Barre area.
 The southern and eastern slopes just give peeks into portions of the Poconos and wider views of the Lehigh Valley descending down to White Haven, for the Poconos technically are left-bank bounded by the Lehigh.
The Belvidere Delaware Railroad (Bel Del, 1851–1871) was a railroad running along the eastern shore of the Delaware River from Trenton, New Jersey north via Phillipsburg, New Jersey to the small village of Manunka Chunk, New Jersey.
 It became an important feeder line for the Lehigh Valley Railroad's join to the Central Railroad of New Jersey, which was constructed into Phillipsburg, NJ at about the same time.
 This connected Philadelphia and Trenton, NJ at one end of the shortline railroad to the rapidly growing lower Wyoming Valley region, and via the Morris Canal or the CNJ, a slow or fast connection to New York City ferries crossing New York Harbor from Jersey City, NJ.
 In 1871 the CNJ leased various railroads in Pennsylvania, most from the Lehigh Coal & Navigation Company allowing the CNJ to penetrate to the upper Wyoming Valley, over some stretches, competing directly with the Lehigh Valley Railroad and with the Lehigh Canal and the trunk road connection of the Belvidere Delaware Railroad to New York became less profitable since Philadelphia connected more easily to Northeastern Pennsylvania thereafter without needing a double-crossing of the Delaware River; a general revenue decline ensued, leading to the Pennsylvania Railroad acquiring the rights, where it served as part of the Pennsylvania Railroad (PRR) system, carrying mainly anthracite coal and iron ore from northeastern Pennsylvania to population centers along the coast.
The Delaware Division of the Pennsylvania Canal, more commonly called the Delaware Canal, runs for 60 mi parallel to the right bank of the Delaware River from the entry locks near the mouth of the Lehigh River and terminal end of the Lehigh Canal at Easton south to Bristol.
 At Easton, which today is the home of The National Canal Museum, the Delaware Canal also connected with the Morris Canal built to carry anthracite coal to energy starved New Jersey industries.
 Later, with a crossing-lock constructed at New Hope, the New Hope 'outlet lock' (1847) connected by Cable Ferry to a feeder navigation/canal at Bull's Island along the opposite shore from Lumberville, which ran over 22 mi south along the left bank through Trenton to Bordentown, the west end of the Delaware and Raritan Canal (1834) to New York City via New Brunswick.
 as part of the solution to the United States' first energy crisis.
 The Commonwealth of Pennsylvania built the Delaware canal to feed anthracite stone coal to energy-hungry Philadelphia as part of its transportation infrastructure building plan known as the Main Line of Public Works—a legislative initiative creating a collection of self-reinforcing internal improvements to commercial transportation capabilities.
Historic Sayre Yard, named after the chief Engineer and first Superintendent of the Lehigh Valley Railroad (LV) was established across the stateline in 1876 in Waverly, New York and Sayre, Pennsylvania.
 The large yard, and the purpose built company town, Sayre, Pennsylvania were founded as part of a planned program of expansion and extension to the young railroad's infrastructure—the yard was but one benchmark on the way to completing the goal of establishing competitive passenger rail service between New York City, as well as cities in Delaware such as Wilmington, cities in central New Jersey such as Trenton, and Eastern Pennsylvania cities including Philadelphia with Chicago and other Great Lakes Cities via Buffalo, New York.
 The Lehigh Valley was primarily first and foremost a coal road which transported high grade Anthracite to the big cities of the east and to steel mills along the Great Lakes and to the area in and around Chicago.
 The yard is a way point along the historic rail corridor that extends along the left bank Susquehanna River through the RBMN Duryea Yard and Mountain Top Yards down along the route of the historic Lehigh Canal and across the Delaware at Easton, Pennsylvania.
The Lehigh Canal or the Lehigh Navigation Canal is a 'navigation' type canal.
 The canal begins at the mouth of Nesquehoning Creek on the Lehigh River in Eastern Pennsylvania.

Question: Which canal, the Lehigh Canal or the Middlesex Canal, is in Eastern Pennsylvania?
Answer: Lehigh Canal