Four tunnel routing alternatives were considered,
and the criteria for selection were based on:
least impact to residents,
least number of properties affected,
most effective use of existing rights-of-way,
and comparable costs
The tunnel will begin with an entrance shaft at the
No Business Creek WRF site. The entrance shaft
will be drilled vertically, with some controlled
blasting also required, until the tunnel elevation
is reached. Next, a tunnel-boring machine will
be installed. The boring machine will drill the
tunnel through solid rock until it reaches the
exit shaft at the site of the Jacks Creek WRF.
Here the tunnel-boring machine will be removed.
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