This map service depicts historic data for the Washington State Route 500K linear referencing system. This data is a snapshot of the roadway system for the year specified in the LRS_Date field. This map service is maintained by the WSDOT GIS and Roadway Data Office. If you are having trouble viewing the service, please email onlinemapsupport@wsdot.wa.gov. If you have questions about the data, please email TransportationGISDataSteward@wsdot.wa.gov.