If you don't already have it, his World War I Draft Registration Card image is also available.
The 1930 Census for Astoria, Clatsop County, Oregon, owning at 2403 Birch St. John B. Miner, age 44 (circa 1885/86), born in Missouri, to both parents born in Tennessee, tallyman atlumber yard. Mamie L, age 42 (circa 1887/88), born in Missouri to father in Kentucky, mother in Missouri Robert E/ age 22 (circa 1907/1908), born in Oregon, proprietor at at an Oil Station
The Oregon Death Index shows a Robert Eld...(name is cut off by database space).He died 19 Dec 1981 in Marion County at age 73.He was born 14 January 1908, spouse name Gladys. --Gladys Magdalene Miner, born 16 January 1913, died 21 December 1988 in Columbia COunty at age 75.
The Social Security Death Index shows this person "last residence" and "Last Benefit" at Woodburn, Marion Co, OR.The SSDI "last residence and "last Benefit" is not always where a person lived.On some occasions, they are the address where a last benefit was sent, but it could be sent to a living spouse, or someone else/funeral home that paid for the burial.(Same for cremation).But, with the Oregon index, there is a good chance he died there.
The Oregon Library System has a ask-a-librarian service: http://www.oregonlibraries.net/http://www.oregonlibraries.net/They have volunteers that do lookups.