The Damon Pythias Mine is located in King County at an elevation of 3,000 feet and is part of the Money Creek mining district. It consisted of 18 claims abutting the Apex claims. The mine is believed to have been discovered around the 1890's about the same time period as the Apex mine. Most of the mine workings were done prior to WWII.
W.J. Priestly who was the manager of the Apex mine was responsible for the development of the mine.
Some of the workings may have been done as late as the 1970's The mine contains a impressive wooden ore shoot that may be of this era.
The primary metals extracted from the mine were gold, silver, and lead. The mine consists of 3,000 feet of underground workings and 2,300 feet of track. At one time the site had a cookhouse and bunkhouse.
Source: Geology and Minerals of King County, WA
Bulletin No.63 1971 Vaughn E. Livingston