# Relationship history for MSHA mine 0101733

Current hierarchy: **Hopper Johnny → K & C Coal Company Inc → K And C Coal Co Inc No 1 Prep Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Gaston Energy Resources Inc → K And C Coal Co Inc No 1 Prep Plant; 1977-05-01 to 1978-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Gaston James → K And C Coal Co Inc No 1 Prep Plant; 1977-05-01 to 1978-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Gaston James → Gaston Energy Resources Inc; 1977-05-01 to 1978-04-27; source msha-controller-operator-history
- **operator_operates_mine:** K & C Coal Company Inc → K And C Coal Co Inc No 1 Prep Plant; 1978-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hopper Johnny → K And C Coal Co Inc No 1 Prep Plant; 1978-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hopper Johnny → K & C Coal Company Inc; 1978-04-28 to current/open; source msha-controller-operator-history