According to this PI article, Beacon Hill station needs to be moved 88 feet because of water, and that will increase cost and may delay the opening of the line as much as two months from the original July 2009 start date. Almost a million dollars has been put into a "contingency account" because of this.
Beacon Hill station has been more expensive than anticipated before:
Beacon Hill costs also have increased prior to Thursday.
The biggest contract for the Beacon Hill work was $294.6 million being paid to builder Obayashi Corp., up from an original price of $280 million. Obayashi and Sound Transit are negotiating over another $20 million contract.
In 2003 and 2004, the agency increased Shannon & Wilson's Beacon Hill consulting fees by more than $3.4 million.
This is a good lesson for Sound Transit when considering the other underground stations that will be built for the Link System over the next ten years. Beacon Hill is certainly the deepest, most complex of these, but there are a lot of similarities in terms of scope relative to the University Link.
Even with the problems, it seems that Sound Transit is sincere about delivering what it has promised:
Other delays, including a shutdown after a fatal construction accident at the site in February, could hold up by two months the opening of the section between downtown Seattle and Tukwila, according to an agency progress report for March.
To prevent that, Sage said, the agency is trying to get subcontractors to complete work on part of the station ventilation system a few weeks earlier than planned and is pressing other contractors to complete electrical signaling and communications systems early as well.
Agency spokesman Geoff Patrick said Sound Transit still expects to open the line to Tukwila by July, 2009.
Awesome! They seem to be doing a fabulous job.