Complex sentence: Chambly is also known for the Chambly Canal, a National Historic Site run by Parks Canada, was built in 1843 to bypass several kilometers of successive Richelieu River rapids between the towns of Chambly, QC, and Saint-Jean-sur-Richelieu.
Split into simpler sentences: Chambly is also known for the Chambly Canal, also run by Parks Canada as a National Historic Site. The canal was built in 1843 to bypass several kilometers of successive rapids between the towns of Chambly, QC, and Saint-Jean-sur-Richelieu.