Sewer Outfall
HEIGHT: 2.6 m
DEPTH AT BOTTOM OF STRUCTURE: up to 27 m
DEPTH AT BOTTOM OF STRUCTURE: up to 27 m
Portsmouth Harbour,
United Kingdom
27m
Project construction
1979-04-30
Two tubes
2.6m
Tunnel elements were towed to sinking place provided with air bags for support and
lowered by purpose-built catamaran rig.
lowered by purpose-built catamaran rig.
Rubber gaskets 115 mm thick.
Sand bedding by injection of sand (300 mm thick)