Would tunnel segments still be lowered into the tunnel from launch shafts even if there was a maintenance shaft available?
June 12, 2020The Delta Conveyance program facilities, including tunnel shafts that are currently proposed to remain following construction, would be constructed at elevations greater than the 200-year flood event and projected sea level rise at year 2100 with considerations for freeboard and wind fetch waves.
June 12, 2020As currently proposed, a dedicated high-voltage power supply would be connected to the launch shaft sites to power the tunnel boring machine cutter head.