DELLMOOR, 15.7 m. [Southbound from Astoria] was named for or by J.S. Dellinger, who established a cranberry bog here in 1912. In spring this section of the route is banked with Scotch broom. Sometimes 15 feet high and bearing long sprays of golden pea-like flowers, it is constantly spreading farther south along the coast. An annual May Festival celebrates the seasonal bloom.
All I can find about Dellmoor on a quick search is the Dellmoor Loop Road. Must not be much left, if there was ever anything much there to begin with. The Dellmoor Bog was noted for its high production of cranberries, with one acre yielding 135 barrels of berries in 1916 or so...