Not surprised that UP had these as McKeen was the superintendent of motive power for UP and then started the company. Here's a listing of McKeen built cars.
U.S. customers[edit]
Ann Arbor Railroad (5 cars)[14]
Arizona Eastern Railroad (2 cars);[15] to Southern Pacific
Atchison, Topeka and Santa Fe Railway (2 cars)[16]
Bellingham Bay and British Columbia (1 car);[15] to Bellingham Northern; to Milwaukee Road
Bessemer and Lake Erie Railroad (1 car)[17]
Buffalo, Rochester and Pittsburgh Railway (1 car)[15]
Central New York Southern Railroad (2 cars)[15]
Charles City Western Railway (1 car)[14]
Chicago and North Western Railway (1 car)[15]
Chicago Great Western Railway (4 cars)[18]
Chicago, Rock Island and Pacific Railroad (5 cars)[15]
Denver, Laramie & Northwestern Railroad (2 cars,Greeley & Denver) to Great Western RR[19]
Erie Railroad[20] (3 cars)[15]
Galveston, Harrisburg and San Antonio Railway (2 cars);[15] to Texas and New Orleans Railroad
Hocking-Sunday Creek Traction Company (1 car)[14]
Houston and Texas Central Railroad (1 car)[15]
Illinois Central Railroad (1 car)[15]
Lakeside and Marblehead Railroad (1 55-ft car, #5, built 1916)[21]
Maryland and Pennsylvania Railroad (trial, car returned to manufacturer)[22]
Maricopa and Phoenix Railroad (2 cars);[15] to Arizona Eastern; to Southern Pacific
Morgan's Lake Railroad (2 cars); to Texas and New Orleans Railroad[15]
Minneapolis, Anoka and Cuyuna Range Railroad[14] (2 cars);[15] to Union Pacific
Minneapolis & Northern Railway(2 cars to Minneapolis, Anoka and Cuyuna Range Railroad to Union Pacific
Norfolk Southern Railroad (1 car)[15]
North Coast Railroad (2 cars); to Oregon-Washington Railway and Navigation[15]
Northern Pacific Railway (1 car)[15]
Oregon and California Rail Road (2 cars); to Southern Pacific[15]
Oregon-Washington Railroad and Navigation Company (3 cars)[15]
Oregon Railroad and Navigation Company (3 cars); to Oregon-Washington Railroad and Navigation Company[15]
Oregon Short Line Railroad (6 cars); 3 to Union Pacific Railroad[15]
Pennsylvania Railroad (1 car)[15]
People's Electric Railroad, Muskogee, Oklahoma (2 cars)[15]
Riviera Beach Railway (Texas) received a McKeen Car from Sand Springs Railway
Salem, Falls City and Western Railway (1 car)[23]
San Diego, Pacific Beach and La Jolla Railway (later Los Angeles and San Diego Beach Railway)[24]
Sand Springs Railway[14] (2 cars)[15]
Silver Peak Railroad[25]
Southern Pacific Company[14] (31 cars)[15]
Tonopah and Goldfield Railroad[25]
Union Pacific Railroad (20 cars)[15]
Virginia and Truckee Railroad (1 car)[15]
Woodstock and Sycamore Traction Company (3 cars)[15]
Export customers[edit]
Victorian Railways, Australia (2 5 ft 3 in (1,600 mm) gauge)[15]
Queensland Railways, Australia (5 3 ft 6 in (1,067 mm) gauge cars — only narrow gauge McKeen cars)[15]
Ferrocarril del Sonora, Mexico (1 car)[15]
Ferrocarril Norte de Cuba, (1 car)[15]