I'm below the Macclesfield canal breach on the Trent & Mersey. Between the breach and me are 12 locks plus the stop lock where the Macclesfield joins the Trent & Mersey.
A #StopLock was to collect tolls at the #junction of canals of different owners. For example, Gas Street Basin had a stop #lock where an act of UK parliament forced a junction. For 20 years, Birmingham Canal Network had refused access to Worcester & Birmingham #canal, so goods had to switch boats over 65 feet of land!