Complex sentence: The connection to Fletcher's Canal was completed in 1800, but with the failure of the scheme to connect the Bolton arm of the canal to the Leeds and Liverpool Canal, the canal remained isolated from any other navigable waterway.
Split into simpler sentences: The connection to Fletcher's Canal was completed in 1800. With the failure of the scheme to connect the Bolton arm of the canal to the Leeds and Liverpool Canal, the canal remained isolated from any other navigable waterway.