Portal Site Brightwater TREATMENT SYSTEM -
King and Snohomish Counties, Washington
The first tunnel machine at this site
"Helene" started tunneling west in fall 2007. It had progressed about
500 feet as of Janurary 2008.
In November, the second machine,
"Rainier" was delivered to the site in pieces and is now being
Helene stopped for a while to allow this second machine to be placed in
the portal, but continued.
Rainier started tunneling
west in February, with both machines at full production in April.