Why Create Milepost 31?
This information center is required by a memorandum of agreement (pdf 510 kb) signed as part of the Alaskan Way Viaduct Replacement Project. The agreement was developed to address Section 106 of the National Historic Preservation Act, which requires agencies to take into account the effects of their projects on historic properties, such as those in the Pioneer Square Historic District.
Within the agreement, city and state preservation officers along with the Federal Highway Administration, nation and local preservation groups, neighborhood organizations and local tribes determined that a project information center is one way WSDOT could help to keep Pioneer Square vital during construction. The agreement also calls for WSDOT to monitor and protect historic buildings during SR 99 tunnel construction and to develop traffic management and construction coordination plans for Pioneer Square.