# Relationship history for MSHA mine 3608453

Current hierarchy: **CONSOL Energy Inc → Kent Coal Mining Company → Marshall Run No 1**

- 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

- **controller_controls_mine:** Rochester & Pittsburgh Coal Company → Marshall Run No 1; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kent Coal Mining Company → Marshall Run No 1; 1994-01-01 to 1998-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Rochester & Pittsburgh Coal Company → Kent Coal Mining Company; 1994-01-01 to 1998-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Kent Coal Mining Company → Marshall Run No 1; 1998-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Marshall Run No 1; 1998-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Kent Coal Mining Company; 1998-09-22 to current/open; source msha-controller-operator-history