# Relationship history for MSHA mine 1505152

Current hierarchy: **Drummond Company Inc → Marigold Docks Inc → Defiance Stoker 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:** Elkhorn & Jellico Coal Company Inc → Defiance Stoker Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Collins Stamper → Defiance Stoker Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bull Creek Mining Corp → Defiance Stoker Tipple; 1950-01-01 to 1974-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Bull Creek Mining Corp → Defiance Stoker Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bull Creek Mining Corp → Bull Creek Mining Corp; 1950-01-01 to 1974-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Davidson J E → Defiance Stoker Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Plateau Mining Company Inc → Defiance Stoker Tipple; 1974-02-12 to 1974-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Collins Stamper → Plateau Mining Company Inc; 1974-02-12 to 1974-09-23; source msha-controller-operator-history
- **operator_operates_mine:** No 8 Limited Of Virginia → Defiance Stoker Tipple; 1974-09-24 to 1977-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Davidson J E → No 8 Limited Of Virginia; 1974-09-24 to 1977-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Elkhorn & Jellico Coal Company Inc → Defiance Stoker Tipple; 1977-05-07 to 1987-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Elkhorn & Jellico Coal Company Inc → Elkhorn & Jellico Coal Company Inc; 1977-05-07 to 1987-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Drummond Company Inc → Defiance Stoker Tipple; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marigold Docks Inc → Defiance Stoker Tipple; 1987-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Drummond Company Inc → Marigold Docks Inc; 1987-01-15 to current/open; source msha-controller-operator-history