# Relationship history for MSHA mine 4405766

Current hierarchy: **Jackson Jackie → Mac Mining Inc → Mine #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:** Mid Point Corp → Mine #1; 1981-10-01 to 1989-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Wallen Glenn A → Mine #1; 1981-10-01 to 1989-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Wallen Glenn A → Mid Point Corp; 1981-10-01 to 1989-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Verity Coal Corp → Mine #1; 1989-10-18 to 1991-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Muse Ronnie → Mine #1; 1989-10-18 to 1991-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Muse Ronnie → Verity Coal Corp; 1989-10-18 to 1991-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Nas Coal Inc → Mine #1; 1991-03-21 to 1991-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Vandagriff Glen Doil & Brutus Metcalf → Mine #1; 1991-03-21 to 1991-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Vandagriff Glen Doil & Brutus Metcalf → Nas Coal Inc; 1991-03-21 to 1991-08-14; source msha-controller-operator-history
- **operator_operates_mine:** J & J Coal Company → Mine #1; 1991-08-15 to 1993-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Wallen Glenn A → Mine #1; 1991-08-15 to 1993-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Wallen Glenn A → J & J Coal Company; 1991-08-15 to 1993-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Mac Mining Inc → Mine #1; 1993-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jackie → Mine #1; 1993-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jackie → Mac Mining Inc; 1993-05-06 to current/open; source msha-controller-operator-history