About one mile below the K’účasčas, the Klamath is pinched between narrow columnar basalt walls. This narrow spot made it an ideal location for the the old railroad bridge, the abutments from which can still be seen. Built primarily to haul lumber, the rail line was completed in 1903, repurposed in 1911 to haul materials for the construction of Copco Dam, and abandoned in the 1940s.