| Number | Model | Model (as built) |
Name | Frame/order number | Serial number | Status |
|---|---|---|---|---|---|---|
| 6050 | SD40-3 | SD40 | Colony, Wy. | 7865-18 | 31431 | active |
| 6051 | SD40-3 | SD40 | City of Sturgis | 7214-2 | 35726 | active |
| 6052 | SD40-3 | SD40 | City of Crawford | 7324-10 | 37648 | active |
| 6053 | SD40-3 | SD40 | City of Whitewood | 7314-16 | 35740 | active |
| 6054 | SD40-3 | SD40 | City of Belle Fourche | 7324-18 | 37906 | active |
| 6055 | SD40-3 | SD40 | City of Chadron | 7998-10 | 33170 | active |
| 6068 | SD40-3 | SD40 | C314 | A2134 | active | |
| 6069 | SD40-3 | SD40 | C314 | A2146 | active | |
| 6070 | SD40-3 | SD40 | C314 | A2150 | active | |
| 6071 | SD40-3 | SD40 | City of Ft. Pierre(2nd) | C314 | A2153 | active |
| 6072 | SD40-3 | SD40 | C318 | A2182 | active | |
| 6073 | SD40-3 | SD40 | C318 | A2190 | active | |
| 6074 | SD40-3 | SD40 | C318 | A2194 | active | |
| 6075 | SD40-3 | SD40 | C318 | A2199 | active | |
| 6076 | SD40-3 | SD40 | C318 | A2202 | active | |
| 6077 | SD40-3 | SD40 | Don Cook | C318 | A2206 | active |
| 6078 | SD40-3 | SD40 | C318 | A2207 | active | |
| 6079 | SD40-3 | SD40 | C318 | A2208 | active | |
| 6080 | SD40-3 | SD40 | C314 | A2141 | active | |
| 6081 | SD40-3 | SD40 | C314 | A2147 | active | |
| 6082 | SD40-3 | SD40 | C314 | A2158 | active | |
| 6083 | SD40-3 | SD40 | City of Rapid City(2nd) | C314 | A2136 | active |
| 6084 | SD40-3 | SD40 | C318 | A2204 | active | |
| 6085 | SD40-3 | SD40 | C339 | A2543 | active | |
| 6086 | SD40-3 | SD40 | C339 | A2544 | active | |
| 6087 | SD40-3 | SD40 | C339 | A2552 | active | |
| 6088 | SD40-3 | SD40 | C339 | A2333 | active | |
| 6089 | SD40-3 | SD40 | C318 | A2178 | active | |
| 6090 | SD40-3 | SD40 | C339 | A2548 | active | |
| 6091 | SD40-3 | SD40 | C314 | A2142 | active | |
| 6092 | SD40-3 | SD40 | C314 | A2161 | active | |
| 6093 | SD40-3 | SD40 | C314 | A2163 | active | |
| 6094 | SD40-3 | SD40 | C318 | A2193 | active | |
| 6095 | SD40-3 | SD40 | C318 | A2201 | active | |
| 6096 | SD40-3 | SD40 | 7159-4 | 34778 | active | |
| 6097 | SD40-3 | SD40-2 | C430-1 | A3981 | active |