The Washington State Department Of Commerce is initiating this Request for Proposal (RFP) to solicit proposals from firms interested in participating in a project to study the current and ongoing effects of the operation of Seattle-Tacoma International Airport and report those findings to the Washington State Legislature. The Washington State Legislature formally asked Commerce on March 21, 2018 via a “two-corners” letter to complete a study that evaluates the current and on-going impacts of the Seattle-Tacoma International Airport. Proposals are due March 15 by 5 p.m.