4-6-6-4
Columns: Railroad (quantity) | Class | Road numbers | Builder | Build year
Clinchfield Railroad (12 new, 6 secondhand) | E-1 | 650–657 | ALCO | 1942–1943 | Clinchfield Railroad (12 new, 6 secondhand) | E-2 | 660–663 | ALCO | 1947 | Clinchfield Railroad (12 new, 6 secondhand) | E-3 | 670–675 | ALCO | 1943 | Delaware and Hudson Railway (40) | J | 1500–1539 | ALCO | 1940–1946 | Denver and Rio Grande Western Railroad (21) | L-105 | 3700–3709 | Baldwin | 1938 | Denver and Rio Grande Western Railroad (21) | L-105 | 3710–3714 | Baldwin | 1942 | Denver and Rio Grande Western Railroad (21) | L-97 | 3800–3805 | ALCO | 1943 | Great Northern Railway (2 secondhand) | Z-6 | 4000–4001 | ALCO | 1937 | Northern Pacific Railway (47) | Z-6 | 5100–5120 | ALCO | 1936–1937 | Northern Pacific Railway (47) | Z-7 | 5121–5126 | ALCO | 1941 | Northern Pacific Railway (47) | Z-8 | 5130–5149 | ALCO | 1943–1944 | Spokane, Portland and Seattle Railway (8) | Z-6 | 900–905 | ALCO | 1937 | Spokane, Portland and Seattle Railway (8) | Z-8 | 910–911 | ALCO | 1944 | Union Pacific Railroad (105) | CSA-1 | 3900–3914 | ALCO | 1936 | Union Pacific Railroad (105) | CSA-2 | 3915–3939 | ALCO | 1937 | Union Pacific Railroad (105) | 4664-3 | 3950–3969 | ALCO | 1942 | Union Pacific Railroad (105) | 4664-4 | 3975–3999 | ALCO | 1943 | Union Pacific Railroad (105) | 4664-5 | 3930–3949 | ALCO | 1944 | Western Maryland Railway (12) | M-2 | 1201–1212 | Baldwin | 1940–1941 | Western Pacific Railroad (7) | M-100 | 401–407 | ALCO | 1938