Hi James, I didn't find the death info for Sim Holloway. I'd contact the Tri-City Genealogical Society, www.tricitygenealogicalsociety.org who does research and probably has the entire WA state death index on microfilm.
I did find Maude A. Holloway died 18 Nov 1984, Vancouver, WA, age 84, estimated birth abt. 1900, Residence=Kennewick per death cert #026932. Source: WA Death Index 1940-1996.
A Maude Holloway, Last Residence=Vancouver, Clark Co., WA born 27 Feb 1900 died Nov. 1984. Her soc. sec. # was assigned in ID before 1951. Source: Social Security Death Index.
To order her death cert, see www.doh.wa.gov/EHSPHL/CHS/cert.htm.
If you're interested in her obit, send an EMAIL to AskALibrarian@secstate.wa.gov with her name, death date & location. They will search the newspaper microfilm for 30 minutes at no charge & email the obit to you. Successful Searching!