The Hattie Mine dates to at least 1899 and by 1902, the Olympic Mining Company had driven several hundred feet of underground workings and had built a substantial camp and a mill building on the shore below the adit of the mine. Roppel (2005) documents much of the early history and personalities of the property and shows an early picture of the camp. Mill machinery was ordered and shipped to the property but never assembled at the Hattie. Shortly thereafter the underground work proved disappointing and the operations of the company and the new mill equipment moved north on Woewodski Island to the Helen S Mine (PE028). The Hattie camp burned in 1911 and there does not seem to have been any underground work on the property since. There is no documented production. However, there have been persistent rumors of at least a small test ore shipment in the early part of the century that was processed at the nearby Helen S mill with mixed results (Roehm, 1945). Since the 1970s, much of Woewodski Island has been covered by claims by a succession of companies: Cominco Exploration, Colony Pacific, Amselco, Kennecott Exploration, Westmin Resources, and currently (Feb 2008) the Bravo Venture Group. Many of the claims covered the Hattie property but other than geochemical sampling and routine sampling of the Hattie dump and underground workings for background, there has been no recent work on the Hattie itself. The underground workings were still accessible in the late 1990s when Still and others (2002) sampled them as part of a regional mineral assessment by the Bureau of Land Management. The workings consist of about 325 feet of drifts, a 65-foot raise, and a winze.

The rocks in the vicinity are mainly rusty-weathering, light-greenish gray calcareous metarhyolite that is part of the Triassic Hyd Group (Brew, 1997, Karl and others, 1999). The metarhyolite is intruded by Mesozoic epidote-hornblende gabbro and by fresh, medium-grained Cretaceous diorite.