The EMD GP30 is a 2,250 hp (1,680 kW) four-axle diesel-electric locomotive built by General Motors Electro-Motive Division of La Grange, Illinois between July 1961 and November 1963. A total of 948 units were built for railroads in the United States and Canada (2 only). It was the first so-called "second generation" EMD diesel locomotive, and was produced in response to increased competition by a new entrant, General Electric's U25B, which was released roughly at the same time as the GP30. The GP30 is easily recognizable due to its high profile and stepped cab roof, unique among American locomotives. A number are still in service today in original or rebuilt form
| Horsepower | Wheel Arrangement | Gearing | Weight | Tractive Effort | DRGW Class | Builder |
| 2250 | B-B | 62:15 | 257508 (3001-13) 260660 (3014-28) |
61773 (3001-13) 62088 (3014-28) |
DE B-B 62 | EMD |
| Rio Grande GP30's 3021-3028 were demoted to B-unit status in 1972 due to the FRA mandate requiring chemical retention toilets in all locomotives. Rather than upgrading the locomotives the Rio Grande chose to demote them. Cab sunshades, speed recorders and other cab equipment were removed.[73] |
| Road # | EMD Builder # | Purchased | Retired/Sold | Notes |
| 3001 | 27135 | 4/1962 | 7/15/1994 | Recieved large Rio Grande logo in mid-70's. To OmniTRAX, St. Louis. MO. [167] To Kansas Southwestern #3001 [167] To Hudson Bay Railway #2508 [167] |
| 3002 | 27136 | 4/1962 | 7/30/1999 | Wrecked at Swan, Colorado, 9/22/1970. Rebuilt by EMD. Received large Rio Grande logo According to [LIST] 3002 was repaired by D&RGW and received large Rio Grande lettering 11/1970. Retired by Union Pacific 7/30/1999 [LIST] |
| 3003 | 27137 | 4/1962 | 7/30/1999 | Wrecked at Crater, Colorado, 12/25/1968. Rebuilt by EMD. Ref. [73] states wreck was at Noland Tunnel. Retired by Union Pacific 7/30/1999 [LIST] |
| 3004 | 27138 | 4/1962 | 5/1995 | To Progress Rail [167] To National Rail Equipment Corporation (NREX) [167] Inman Services, Baytown, TX [167] Cimarron Valley Railroad #3004 [167] |
| 3005 | 27139 | 4/1962 | 12/1970 | Destroyed in wreck at Swan, Colorado, 9/22/1970 |
| 3006 | 27140 | 4/1962 | 12/23/1998 | Retired by Union Pacific 12/23/1998 [LIST] |
| 3007 | 27141 | 4/1962 | 4/28/1997 | National Rail Equipment Corporation (NREX) [167] |
| 3008 | 27142 | 5/1962 | 4/28/1997 | National Rail Equipment Corporation (NREX) [167] |
| 3009 | 27143 | 5/1962 | 1/1975 | Destroyed in wreck at Brendel, Utah, 9/21/1974 |
| 3010 | 27144 | 5/1962 | 9/30/1991 | Wrecked at Cliff, CO, sold for scrap to Iron & Metals Co., 3/16/1992 [167] |
| 3011 | 27222 | 5/1962 | 12/1994 | To OmniTRAX, Wichita, KS, 2/11/1995 [167] |
| 3012 | 27223 | 5/1962 | 1/1972 | Destroyed in wreck at Cedarwood, Colorado, 6/10/1971 |
| 3013 | 27224 | 5/1962 | 12/1993 | OmniTRAX, 8/1995 [167] |
| 3014 | 28043 | 1/1963 | 8/1995 | Damaged in wreck at Crater, Colorado, 12/25/1968. Rebuilt by EMD. Received large Rio Grande logo Progress Rail, to National Rail Equipment Corporation (NREX) [167] To Cimarron Valley Railroad #3014 in 1996 [167] |
| 3015 | 28044 | 2/1963 | 5/31/1999 | Retired by Union Pacific 5/31/1999 [LIST] |
| 3016 | 28045 | 2/1963 | 5/30/1995 | Progress Rail, 8/1995 [167] Hartwell RR #3016, 7/1996 [167] |
| 3017 | 28046 | 2/1963 | 4/16/1996 | Progress Rail [167] Metro East Industries, 12/1996 [167] |
| 3018 | 28047 | 2/1963 | 5/7/1996 | Metro East Industries, 1997 [167] Larry's Truck & Electric Service, Niles, OH, by 2/1998 [167] |
| 3019 | 28048 | 2/1963 | 12/1993 | OmniTRAX, 1995 [167] |
| 3020 | 28049 | 2/1963 | 5/1995 | Midwest Metallics [167] National Rail Equipment Corporation (NREX) [167] Cimarron Valley RR #3020 [167] |
| 3021 | 28050 | 2/1963 | 9/1995 | Progress Rail [167] Hartwell RR #3021, 7/1996 [167] |
| 3022 | 28051 | 2/1963 | 2/8/1995 | Progress Rail [167] |
| 3023 | 28052 | 2/1963 | 9/1995 | Damaged in wreck at Swan, Colorado, 9/22/1970. Rebuilt by EMD. Progress Rail [167] National Rail Equipment Corporation (NREX) [167] Cimarron Valley RR #3023 |
| 3024 | 28053 | 2/1963 | 5/1995 | Progress Rail, 9/1995 [167] National Rail Equipment Corporation (NREX) [167] Cimarron Valley RR #3024 |
| 3025 | 28054 | 2/1963 | . | Destroyed in wreck in Byers Canyon, 8/7/1982 |
| 3026 | 28055 | 2/1963 | 7/15/1994 | OmniTRAX [167] |
| 3027 | 28056 | 2/1963 | 12/1993 | Damaged in wreck at Crater, Colorado, 12/25/1968. Rebuilt by EMD. Received large Rio Grande logo OmniTRAX, 2/1995 [167] |
| 3028 | 28057 | 2/1963 | 12/1993 | OmniTRAX, 2/1995 [167] |
