# Relationship history for MSHA mine 3608348

Current hierarchy: **Drew L  Kimmel → Dutch Run Coal Inc → Copus Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Thomas P Mc Cullough → Copus Mine; 1992-06-01 to 1993-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cullough Thomas P → Copus Mine; 1992-06-01 to 1993-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cullough Thomas P → Thomas P Mc Cullough; 1992-06-01 to 1993-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Drew L  Kimmel → Copus Mine; 1993-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dutch Run Coal Inc → Copus Mine; 1993-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Drew L  Kimmel → Dutch Run Coal Inc; 1993-09-16 to current/open; source msha-controller-operator-history