# Relationship history for MSHA mine 1509439

Current hierarchy: **Jones Edgar → Bucks Branch Coal Company → 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

- **operator_operates_mine:** J V B Corp → No 1 Tipple; 1976-01-01 to 1977-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Dingus Jack G → No 1 Tipple; 1976-01-01 to 1977-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Dingus Jack G → J V B Corp; 1976-01-01 to 1977-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Continental Resources & Mineral Corp → No 1 Tipple; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mims Frank & Jim Griffith → No 1 Tipple; 1977-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Continental Coal Sales Corp → No 1 Tipple; 1977-06-02 to 1979-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Continental Resources & Mineral Corp → Continental Coal Sales Corp; 1977-06-02 to 1979-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Nuclear Dynamics Resources Inc → No 1 Tipple; 1979-05-04 to 1981-03-15; source msha-controller-operator-history
- **operator_operates_mine:** C & B Coal Company → No 1 Tipple; 1979-05-24 to 1979-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Mims Frank & Jim Griffith → C & B Coal Company; 1979-05-24 to 1979-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Hollie Mining Company → No 1 Tipple; 1979-08-01 to 1981-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Nuclear Dynamics Resources Inc → Hollie Mining Company; 1979-08-01 to 1981-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Bucks Branch Coal Company → No 1 Tipple; 1981-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Edgar Et Al → No 1 Tipple; 1981-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Edgar Et Al → Bucks Branch Coal Company; 1981-03-16 to current/open; source msha-controller-operator-history