sentences:  It is long, and emerges into a deep cutting with almost vertical sides.Cuttings and embankments enable the canal to reach Wheaton Aston, where there is a single lock, after which Stretton Spoil Bank brings the canal to Stretton Aqueduct, a cast iron structure that crosses the A5 road, which follows the route of the Roman Watling Street at this point.Belvide reservoir is just beyond the road, and is the main supply of water for the canal.