As the topic of run-throughs and pooled power has come up several times in various threads, I thought it would be a good idea if we had a thread dedicated exclusively to the topic of run-throughs and pooled power. I have compiled a brief list of railroads the Frisco operated run-through trains with, along with their accompanying symbols. Atchison, Topeka & Santa Fe: CTB (Clovis-Tulsa-Birmingham; San Francisco/Los Angeles-Birmingham), QLA (Quanah-Los Angeles; Richmond-San Francisco/Los Angeles), QSF (Quanah-San Francisco; Tulsa-Barstow), 666 (Barstow-Tulsa) Union Pacific: FSE (Florida South East; Seattle-Miami), FSE-2 (Second Florida South East; Seattle-Memphis), NWF (North West Forwarder; Memphis-Seattle), KCX (Kansas City Express; Jacksonville-North Platte) Burlington Northern: 131 (Portland-Hamlet) Seaboard Coast Line: QLA (Quanah-Los Angeles; Richmond-San Francisco/Los Angeles), FSE (Florida South East; Seattle-Miami), KCX (Kansas City Express; Jacksonville-North Platte), 131 (Portland-Hamlet) While these were the only run-throughs I was able to find listed in the 1975 and 1980 operating data sheets, it is possible the Frisco also operated run-throughs and/or pooled power with the following railroads as well. Southern Pacific: Until the Burlington Northern merger, the Southern Pacific was Frisco's primary connection to the Texas Gulf Coast. According to the 1975 and 1980 operating data sheets, Frisco operated three trains to Sherman. These were the 430 (Sherman-Tulsa), 530 (Tulsa-Sherman) and 531 (Tulsa-Sherman). The Frisco also operated 33 (Texas Special; St. Louis-Irving), which seemed to be dedicated exclusively to Espee traffic. All four of these trains connected to Espee trains either originating or terminating at Espee's Englewood Yard in Houston. Photographic evidence confirms Espee power was known to operate into Cherokee Yard on occasion, though there is no comparable photographic evidence of Frisco power making its way down to Englewood Yard. New York Central/Pennsylvania/Penn Central/Conrail: During the mid-1960s, the New York Central inaugurated run-through service with Frisco competitors MoPac and Cotton Belt from North Little Rock and Pine Bluff to its Big Four Yard in Indianapolis. The Pennsylvania followed suit shortly thereafter, beginning run-through service with MoPac and Cotton Belt from North Little Rock and Pine Bluff to Conway. MoPac and Cotton Belt continued operating these run-through trains with Penn Central and Conrail. To my knowledge, the Frisco never operated comparable run-through trains with the New York Central, Pennsylvania, Penn Central or Conrail. However, operating data sheets published in 1980 list train 30 (Oklahoma City-St. Louis) as handling tonnage from Tulsa bound for Conrail at St. Louis. Southern: Southern locomotives were known to operate on Frisco lines from time to time, though in general, it seems as though the Southern preferred MoPac over Frisco. According to a 1979 Southern freight schedule, Southern 154 (Birmingham-Potomac Yard) received traffic from the Frisco at Birmingham and Southern 173 (Potomac Yard-Memphis) handled traffic bound for the Frisco at Kansas City and Memphis. Norfolk & Western: A 1973 Norfolk & Western freight schedule lists train DS-11 (Detroit-St. Louis 11) as a run-through with the Frisco, connecting to Frisco trains 37 (St. Louis-Tulsa) and 437 (St. Louis-Fort Worth). Operating data sheets list train 34 (Fort Worth-St. Louis) as handling tonnage from Tulsa bound for the Norfolk & Western at St. Louis. It is unknown if Norfolk & Western power ever operated on Frisco rails, though it has been confirmed Frisco and Norfolk & Western locomotives mingled while in pool service on the Union Pacific. Missouri Pacific: The 1980 operating data sheets list trains 38 (Fort Worth-Kansas City) and 39 (Kansas City-Fort Worth) as originating and terminating at MoPac's Centennial Yard in Fort Worth. There is ample photographic evidence of MoPac power on Frisco rails and I've found at least one source that says MoPac and Frisco pooled power.