The SR 520 program area includes several properties with designated historic status, as defined through Section 106 of the federal National Historic Preservation Act. This law requires us to work with affected stakeholders collaboratively to reduce a project’s effects on historic properties. Per the Section 106 Programmatic Agreement (PDF 2.9MB), a Community Construction Management Plan (CCMP) is currently in development. This plan represents a commitment from WSDOT to reduce the project’s construction effects on neighboring homes and businesses.
Our CCMP is an evolving plan that will be updated by the by the design-build contractor based on their construction methods and approach. In this draft we will include what we anticipate the contractor will do and outline standards and best practices the contractor must follow. The public can provide ongoing input on how the contractor can avoid or reduce project effects on historic properties and other neighborhood residences and businesses.
We are also developing a Tree and Vegetation Management and Protection Plan (TVMPP) as part of the Portage Bay CCMP. The TVMPP will describe the standards and best management practices to preserve and protect trees and vegetation around the project construction area. The plan will show areas of mature tree removal, protection, and restoration, including areas temporarily dedicated to construction. Input from the city of Seattle and other stakeholders is being considered in the development of the TVMPP. During construction, we will follow the TVMPP and notify neighborhoods before construction activities.