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| | 645 HHD Regional Support Group | SOUTHFIELD | MI |
| 406 CSSB | 406 HHC BN (CSS) | ANN ARBOR | MI |
| 406 CSSB | 180 CO (MDM TRK)(CARGO) | MUSKEGON | MI |
| 406 CSSB | 182 CO MDM TRK | TRAVERSE CITY | MI |
| 406 CSSB | 301 CO (WTR PURIF & DISTR) | GRAND RAPIDS | MI |
| 406 CSSB | 401 CO (MDM TRK) | AUGUSTA | MI |
| 406 CSSB | 431 CO (PETRL P/L&TML OP) | AUGUSTA | MI |
| 406 CSSB | 858 DET (MVT CTL) | BAY CITY | MI |
| 406 CSSB | 919 CO (CGO TRF) | SAGINAW | MI |
| 406 CSSB | 952 CO (PETRL P/L&TML OP) | LIVONIA | MI |