Question: What river does Beaver and Erie Canal and Louisville and Portland Canal have in common?

<P0-S0>  The Falls form the only barrier to navigation between the origin of the Ohio at Pittsburgh and the port of New Orleans on the Gulf of Mexico; circumventing them was long a goal for Pennsylvanian and Cincinnatian merchants. <P0-S1>  The canal opened in 1830 as the private Louisville and Portland Canal Company but was gradually bought out during the 19th century by the federal government, which had invested heavily in its construction, maintenance, and improvement. <P0-S2>  The Louisville and Portland Canal became the McAlpine Locks and Dam in 1962 after extensive modernization. <P0-S3> The Louisville and Portland Canal was a 2 mi canal bypassing the Falls of the Ohio River at Louisville, Kentucky. <SEP> <P1-S0>  The canal ran 136 mi north–south near the western edge of the state from the Ohio River to Lake Erie through Beaver County, Lawrence County, Mercer County, Crawford County, and Erie County, Pennsylvania. <P1-S1> The Beaver and Erie Canal, also known as the Erie Extension Canal, was part of the Pennsylvania Canal system and consisted of three sections: the Beaver Division, the Shenango Division, and the Conneaut Division. <SEP> <P2-S0> Tinkers Creek Aqueduct is an aqueduct that was constructed to bridge the Ohio and Erie Canal over Tinkers Creek near its confluence with the Cuyahoga River in Valley View, Ohio. <P2-S1>  It is a relatively rare surviving example of an Ohio and Erie Canal aqueduct. <P2-S2>  It was originally constructed in 1825-1827 by, and re-built due to flood damage in 1845 and 1905. <P2-S3>  Tinkers Creek Aqueduct was included in a National Historic Landmark district established in 1966, and it was separately listed on the National Register of Historic Places in 1979. <P2-S4>  The original Tinkers Creek Aqueduct was a wood plank, steel truss, and Ashlar-sandstone structure constructed in 1827, south of the present aqueduct's location. <P2-S5>  Cuyahoga River and Tinkers Creek flooding caused continual damage to the original aqueduct, so successive structures were built in 1845 and 1905 in the present location. <P2-S6>  Today, Tinkers Creek Aqueduct is the only aqueduct which remains of the four original aqueducts in the Cuyahoga Valley. <P2-S7>  Of Furnace Run Aqueduct, Mill Creek Aqueduct, Peninsula Aqueduct, and (? <P2-S8>  Yellow Creek ?) <P2-S9>  Aqueduct; Mill Creek Aqueduct, of newer construction, is the only aqueduct which still carries Ohio and Erie Canal water. <P2-S10>  After 102 years of flooding, weathering, and deterioration, Tinkers Creek Aqueduct was removed in 2007. <P2-S11>  The National Park Service is currently working on Phase II of the project to reconstruct it from newer materials. <SEP> <P3-S0> 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). <P3-S1>  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.