The approximately 2½-acre district encompasses the most important components associated with the operation.  The lixiviation process employed salt in the leaching of silver from the ores extracted from nearby mines.  The 1½-story wood frame sampling works building, measuring 77 in length and 42 feet in width, and a portion of a one-story salt shed remain on the site.  Large portions of the sandstone foundation are all that remain of the multi-story mill building which appears to have been over 250 feet in length.  Listed under Historic Resources of Aspen and Mining Industry in Colorado Multiple Property Submissions.