[?] Southern Pacific In Action Southern Pacific In Action SP 5114 uses Union Pacific tracks in Little Rock, Arkansas for local to Pine Bluff, Ark. 1995. SP 7768 and other locomotives in deadline at Cotton Belt yard in Pine Bluff, Arkansas. November 26, 1995. SP 8121 & SP 8172 among the hay bales at Cart north of Bossier City, LA. September 26, 1998. SP 8197 crosses over I-20 just past Murphy Street in Shreveport, La. November 22, 1998.