Miner & Civil Engineer. He was one of the original 14 charter members of the Washington State Good Roads Association, and was its last surviving charter member. He arrived in Seattle in 1871 at the age of 13. As a young man he became interested in civil engineering, and helped survey the Northern Pacific railroad track across the Northwest before settling on May Creek (today [2007] in the northern part of the city of Renton) in 1884. He mined and worked in Canada's Yukon Territory and in Alaska for a dozen years during the 1890s and 1900s. But he is particularly remembered as a major player in the Good Roads Association during the early decades of the twentieth century, while at the same time continuing his career as an engineer and taking an active role in Renton's civic affairs. Blessed with good health, Monohon lived well into his 90s. He died in July 1951, three months after his 93rd birthday.
Born on April 25, 1858, near Roseburg, Oregon. He was the son of Martin Monohon (1820-1914) and Isabelle Monohon (1824-1912). (Martin Monohon would later become known as one of the first white settlers on the eastern shore of Lake Sammamish.) He lived in Oregon and Idaho as a young boy, and moved to Seattle with his family in 1871.
Young Monohon completed his schooling in Seattle. The family remained in Seattle until 1877, at which time Martin moved to the eastern shore of Lake Sammamish in what is today the southern part of the city of Sammamish. Lee is reported to have helped his father "clear and develop the homestead" (Bagley, p.870), but whether this was on their Seattle property or the property east of Lake Sammamish is not recorded (perhaps both).
(Credit to FAG member Rodeogirl73 for this great information)