The bottom slide looks like 19th St. Yard in Kansas City, MO in the 1970s. Not sure about the top slide. All the same, thanks for sharing!!
Top slide is Shrewsbury, MO (just west of St Louis) right next to I-44 on Wellington Ct. You've got an enclosed auto-rack and a semi-enclosed rack placing it mid to late 70's, but the black paint on those units place it prior to February, 1979. Okay, the actual date of the photo is June 19th - 1978 according to gelwood.railfan.net 's SLSF index (see unit 310). Best Regards & thanks for sharing!! - Mike