Ruins of Holbert Assay Laboratory on the Silverbrook Trail, Interstate Park – St. Croix Falls, Wisconsin
©2012 John Wanserski for Creative Juice LLC
“Holbert drilled numerous shafts including one said to be 600 feet deep, which are now, at least partially, filled with debris. Only the stone walls of the assay laboratory and office still stand.” Source: St. Croix Tales & Trails.
Map of Interstate Park (PDF file)
St. Croix Tales and Trails by Rosemarie Vezina Braatz (Amazon entry)
Weather forecast for the St. Croix Falls, WI
Blog entries for Interstate Park
