Complex sentence: It runs just under 12 miles (19 km) from the River Trent through 15 locks to the Langley Mill Basin where it joins the Nottingham Canal and the Cromford Canal (both currently in a state of abandonment).
Split into simpler sentences: It runs just under 12 miles (19 km) and has 15 locks. The canal finally ends at the Langley Mill basin, where it joins the Nottingham Canal and the Cromford Canal (both currently in a state of abandonment).