 At Cajon the concrete pads that served as the foundations for the railroad's station facilities and water tanks there remain long after the buildings atop them were removed.The Santa Fe realigned the track at several places during the 20th century to straighten curves along Cajon Creek (between Cajon and San Bernardino), lower grades for eastbound trains with the 1913 addition of a separate track through what has come to be known as Sullivan's Curve, and to reduce some curvature and lower the pass's summit elevation by 50 ft (15 m).The maintenance shops in San Bernardino are still in use by BNSF Railway, although not to the extent that they were used in the 20th century.