 The LA&SL operated independently until April 27, 1921, when the UP agreed to acquire Clark's half-interest in the railroad.After 1921 the LA&SL lines were operated as part of the UP system, although the LA&SL corporation continued to exist on paper until January 1, 1988.The former LA&SL main line remains part of the UP network today as the Caliente and Lynndyl Subdivisions.