This hazardous 1905 Washington State Parks and Rec tunnel in Easton, Washington had extensive damage throughout the concrete liner and desperately needed to be rehabilitated. The first order of business was to scale all the loose concrete liner. Secondly, Rock Supremacy installed welded wire fabric throughout the tunnel before we applying shotcrete. We installed tensioned rock bolts where severe spalling was occurring. Rock Supremacy applied 4" thick shotcrete on the inside of each tunnel and portals. All shotcrete surfaces were hand-troweled to provide a smooth finish.