# Relationship history for MSHA mine 1509376

Current hierarchy: **Pellitier Robert A → National Coal & Recovery Inc → National Coal #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Forest Coal Company → National Coal #1 Prep Plant; 1975-05-01 to 1977-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Watts James → National Coal #1 Prep Plant; 1975-05-01 to 1977-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Watts James → Forest Coal Company; 1975-05-01 to 1977-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Forest Coal Company Inc → National Coal #1 Prep Plant; 1977-08-16 to 1978-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Turner J M → National Coal #1 Prep Plant; 1977-08-16 to 1978-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Turner J M → Forest Coal Company Inc; 1977-08-16 to 1978-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Kencoal Associates → National Coal #1 Prep Plant; 1978-11-28 to 1980-10-06; source msha-controller-operator-history
- **controller_controls_mine:** Banner Industries & Kinemotive Energy → National Coal #1 Prep Plant; 1978-11-28 to 1982-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Banner Industries & Kinemotive Energy → Kencoal Associates; 1978-11-28 to 1980-10-06; source msha-controller-operator-history
- **operator_operates_mine:** National Coal & Recovery Inc → National Coal #1 Prep Plant; 1980-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pellitier Robert A → National Coal #1 Prep Plant; 1980-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pellitier Robert A → National Coal & Recovery Inc; 1980-10-07 to current/open; source msha-controller-operator-history