The process is underway for the City of Seattle to shake out a final deal for handing over public right of way to the developers of the Washington State Convention Center expansion.

The Seattle City Council’s sustainability and transportation committee chaired by Mike O’Brien held its first session on a proposed vacation of “Block 33, Block 43, Block 44, Olive Way & Terry Avenue” to make way for construction of the estimated $1.6 billion Convention Center addition and development that will create a massive new exhibition facility across I-5 between Pike and Olive Way.

Last fall, a coalition of community groups reached agreement on a $80 million package of public benefits proposed to offset the value of the lost public right of way necessary to complete the WSCC addition as designed.

While Community Package Coalition’s work was widely celebrated there may be room for movement in some of the line items — especially affordable housing. Nonprofit developer Capitol Hill Housing had proposed more than $50 million in affordable housing benefits as part of the vacation package but ultimately the line item shook out to less than $30 million. Developers on the project the Pine Street Group is already on the offensive about any possible push to add more to the $82.8 million package. Pro-business voices including Capitol Hill business owner Dani Cone of Fuel Coffee have also been recruited to call for the vacation package legislation to be finalized in order to move the WSCC addition construction forward as quickly as possible.

Tuesday, O’Brien asked Pine Street Group’s Matt Griffin about a planned series of three phases over ten years after the start of construction under which the $82.8 million package will be funded, many aspects of which would hinge on state funding at the legislative level.

The benefits coalition represented community groups and nonprofits including the First Hill Improvement Association, Lid I-5, Capitol Hill Housing, Cascade Bicycle Club, Central Seattle Greenways, Housing Development Consortium, Freeway Park Association, and Seattle Neighborhood Greenways.

The WSCC expansion will add five stories above ground and two stories below ground totaling a little more than 1.2 million square feet of space, in addition to a 200,000 square foot loading dock and 500-800 parking spaces. Bringing thousands of truck trips to the area, most of the construction will rise above the land that has been home to King County Metro Convention Place Station, roughly bounded by Pine and Howell streets and 9th and Boren.

The process to shape the final vacation legislation will tick up another level in two weeks when City Hall hosts a public hearing on April 18th.