Paddles to the side ponds, not currently operational.

It is a challenge to write succinct instructions for the operation of a two-sidepond lock. The sequence to ascend an already full lock ought to be:1. Open top sidepond paddle2. Wait for levels to equalise and close paddle.3. Open lower sidepond paddle4. Wait for levels to equalise and close paddle.5. Open bottom ground paddle(s)6. Wait for levels to equalise and open bottom gate(s) for boat(s) to enter lock7. Close bottom ground paddle(s) as boat(s) enter(s) lock8. Close bottom gate(s)9. Open lower sidepond paddle10. Wait for levels to equalise and close paddle.11. Open top sidepond paddle12. Wait for levels to equalise and close paddle.13. Open top ground paddle(s)14. Wait for levels to equalise and open top gate(s) for boat(s) to leave lock15. Close top ground paddle(s) as boat(s) leave lock16. Close top gate(s)Do it all again at the next lock ...

Photograph taken by PeterScott on 2 July 2005 and was added to the database on Wednesday the 13th of July, 2005

This photo is one of 10 of Knowle Bottom Lock No 47 on the Grand Union Canal (Warwick and Birmingham Canal: widened section - Main Line) [Previous | Next]