# Relationship history for MSHA mine 4607501

Current hierarchy: **Potts Glen → Cherokee Coal Company Inc → Strip #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

- **operator_operates_mine:** Cherokee Coal Company Inc → Strip #1; 1988-04-01 to 1989-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Elder Charles W → Strip #1; 1988-04-01 to 1989-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Elder Charles W → Cherokee Coal Company Inc; 1988-04-01 to 1989-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Cherokee Coal Company Inc → Strip #1; 1989-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potts Glen → Strip #1; 1989-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potts Glen → Cherokee Coal Company Inc; 1989-05-10 to current/open; source msha-controller-operator-history