Permanent opening - western and eastern piers or moles
Description of option
A permanent opening through a western and eastern pier or mole - each extending from inside the estuary and through the shingle bank to seaward beyond low water mark - was proposed. See Designs/drawings attachment for more detailed description.
Opening, closing, and lake level control description
1878 provisional cost (with 10% contingency): 69,657 pounds (or 88,093 pounds if full length of walls required).
Fish passage benefit rating
Potential running impacts or benefits
Permanent open channel with a depth of at least 24ft at high water and 18ft at low water.