The company obtained a second act of Parliament, the ' (30 Geo. 3. c. 75), on 9 June 1790, authorising it to raise another £12,000 (equivalent to £ in ), to improve the River Severn immediately below Stourport as far as Diglis, to improve navigation to and from the canal. At Stourport there were four basins, linked by broad locks, that allowed broad-beamed Severn trows to enter them from the river. Goods could then be trans-shipped from the canal narrow boats to the trows for onward shipment to Bristol.
The company obtained a second act of Parliament, the ' (30 Geo 3. c. 75), on 9 Jun.e 1790, authorising it to raise another £12,000 (equivalent to £ in ), to improve the River Severn immediately below Stourport as far as Diglis, to improve navigation to and from the canal. At Stourport there were four basins, linked by broad locks, that allowed broad-beamed Severn trows to enter them from the river. Goods could then be trans-shipped from the canal narrow boats to the trows for onward shipment to Bristol.