Unsure if lot is publicly or privately owned; Washington County website classifies lot as 'suburban improved' and not owing any taxes:
https://washcotax.co.washington.or.us/Property-Detail/PropertyQuickRefID/R953463/PartyQuickRefID/O413000

Usually lots that are publicly owned show up as being tax exempt with code CIX (owned by city), such as the lot for Sunrise Park:
https://washcotax.co.washington.or.us/Property-Detail/PropertyQuickRefID/R481972/PartyQuickRefID/O191821