# Relationship history for MSHA mine 1510584

Current hierarchy: **Adkins James E Ii → Central Kentucky Fuel Inc → Central No 4 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Energy Klenzing Systems → Central No 4 Prep Plant; 1977-07-01 to 1979-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Kennedy Sam & L G Kays → Central No 4 Prep Plant; 1977-07-01 to 1979-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Kennedy Sam & L G Kays → Energy Klenzing Systems; 1977-07-01 to 1979-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Royalton Coal Processing Company → Central No 4 Prep Plant; 1979-06-28 to 1980-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Pero Jaime A--Donald Baker & James V Celano Jr → Central No 4 Prep Plant; 1979-06-28 to 1980-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Pero Jaime A--Donald Baker & James V Celano Jr → Royalton Coal Processing Company; 1979-06-28 to 1980-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Adkins James E Ii → Central No 4 Prep Plant; 1980-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Central Kentucky Fuel Inc → Central No 4 Prep Plant; 1980-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins James E Ii → Central Kentucky Fuel Inc; 1980-05-27 to current/open; source msha-controller-operator-history