# Relationship history for MSHA mine 4405028

Current hierarchy: **Mullins George → Holly Coal Company Inc → No 1 Tipple**

- 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:** Bav Liquidating Corp → No 1 Tipple; 1950-01-01 to 1979-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Iron Coal & Coke Company → No 1 Tipple; 1978-04-01 to 1979-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Bav Liquidating Corp → Virginia Iron Coal & Coke Company; 1978-04-01 to 1979-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Iron Coal & Coke Company → No 1 Tipple; 1979-06-29 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → No 1 Tipple; 1979-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Virginia Iron Coal & Coke Company; 1979-06-29 to 1989-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Mullins George → No 1 Tipple; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Grigsby → No 1 Tipple; 1987-08-01 to 1993-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Baker Land Company Inc → No 1 Tipple; 1989-07-01 to 1990-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Baker Marvin J → No 1 Tipple; 1989-07-01 to 1990-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Baker Marvin J → Baker Land Company Inc; 1989-07-01 to 1990-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Classic Energy Inc → No 1 Tipple; 1990-09-06 to 1993-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Grigsby → Classic Energy Inc; 1990-09-06 to 1993-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Baker Coal Sales Inc → No 1 Tipple; 1993-09-14 to 1996-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Baker Marvin J → No 1 Tipple; 1993-09-14 to 1996-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Baker Marvin J → Baker Coal Sales Inc; 1993-09-14 to 1996-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Holly Coal Company Inc → No 1 Tipple; 1996-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins George → Holly Coal Company Inc; 1996-08-30 to current/open; source msha-controller-operator-history