This nonprofit was founded in 1998 to preserve the unique history of the WI&M Railway and the Potlatch Lumber Company. The group incorporated in 2000 and purchased the WI&M Depot in Potlatch Idaho in 2001.
With acquisition of the depot and its subsequent restoration, the group has sponsored cultural events, to enhance its mission of historical education and exhibition. Now renovating the second floor for a co-op of small business offices, the HPG hopes to promote economic development in this depressed rural area and provide for the depot's long-term maintenance.