Vortex Drop Shaft

A vortex drop shaft will be used to
drop or lower flood waters from the
diversion channel to the tunnel under
Route 83. Energy will be dissipated
in the drop shaft as the stormwater
vortexes a depth of 80 feet down the

Air will be released through the
core or the center of the shaft
This will allow water to flow
more freely and efficiently
through the tunnel into the