# Relationship history for MSHA mine 4403720

Current hierarchy: **Freeman Charles → Boaz Coal Company Inc → No 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

- **controller_controls_mine:** Fletcher Paul & Lawson Ramey → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → No 1; 1973-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hackney Fuel Company Inc → No 1; 1974-01-01 to 1976-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Hackney Frank W → No 1; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Frank W → Hackney Fuel Company Inc; 1974-01-01 to 1976-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Little Rock Coal Company → No 1; 1976-04-14 to 1977-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Fletcher Paul & Lawson Ramey → Little Rock Coal Company; 1976-04-14 to 1977-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp No 6 → No 1; 1977-03-21 to 1979-01-17; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Wellmore Coal Corp No 6; 1977-03-21 to 1979-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Freeman Charles → No 1; 1978-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & R Coal Company → No 1; 1979-01-18 to 1979-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Ramey Dennis & Willard → No 1; 1979-01-18 to 1979-04-16; source msha-controller-operator-history
- **controller_controls_operator:** Ramey Dennis & Willard → R & R Coal Company; 1979-01-18 to 1979-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Boaz Coal Company Inc → No 1; 1979-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeman Charles → Boaz Coal Company Inc; 1979-04-17 to current/open; source msha-controller-operator-history