^ abDunster, Chris; Mattson, Larry (15 July 2010). "Point Defiance Bypass Project"(PDF). WSDOT. Technical Advisory Team. Retrieved 25 July 2020.
^ abDunster, Chris; Mattson, Larry (15 July 2010). "Point Defiance Bypass Project"(PDF). WSDOT. Technical Advisory Team. p. 10. Retrieved 25 July 2020.