Popham's Eau + The Middle Level Main Drain

Situated at Three Holes, Norfolk. Three Holes used to be Wadingstow until sometime after 1609 when a Session of Sewers at Ely made an order for a new bridge to include "three arches each eight foot broad with three sufficient doors to shut in times of necessity and want of water for the navigation through the town of Well (now Upwell)." 
One for Wide Wed 'water'. Thank you RockArea.