# Relationship history for MSHA mine 4608063

Current hierarchy: **Everett E  Ballard Jr → Ballard Brothers Coal Inc → Buffalo No 11**

- 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:** United  Company → Buffalo No 11; 1978-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen T  Workman Jr → Buffalo No 11; 1986-08-25 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Everett E  Ballard Jr → Buffalo No 11; 1991-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dal-Tex Coal Corp → Buffalo No 11; 1991-07-01 to 1991-08-31; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Dal-Tex Coal Corp; 1991-07-01 to 1991-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Sharples Coal Corp → Buffalo No 11; 1991-09-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Allen T  Workman Jr → Sharples Coal Corp; 1991-09-01 to 1992-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Sharples Coal Corp → Buffalo No 11; 1992-04-01 to 1992-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Buffalo No 11; 1992-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Sharples Coal Corp; 1992-04-01 to 1992-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Ballard Brothers Coal Inc → Buffalo No 11; 1992-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett E  Ballard Jr → Ballard Brothers Coal Inc; 1992-06-10 to current/open; source msha-controller-operator-history