# Relationship history for MSHA mine 4606088

Current hierarchy: **Tomblin Millard → Double E Mining Inc → Double E Mining 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:** Hatfield Ewell → Double E Mining No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shannon Wells G-Ralph Et Al → Double E Mining No 1; 1973-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sturgon Coal Company → Double E Mining No 1; 1979-11-01 to 1986-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Shannon Wells G-Ralph Et Al → Sturgon Coal Company; 1979-11-01 to 1986-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Marcus Coal Company Inc → Double E Mining No 1; 1986-01-07 to 1987-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Ewell → Marcus Coal Company Inc; 1986-01-07 to 1987-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Marcus Coal Company Inc → Double E Mining No 1; 1987-04-14 to 1989-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Hatfield Gary → Double E Mining No 1; 1987-04-14 to 1989-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Gary → Marcus Coal Company Inc; 1987-04-14 to 1989-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Marcus Coal Company Inc → Double E Mining No 1; 1989-02-21 to 1990-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Brown Katrina → Double E Mining No 1; 1989-02-21 to 1990-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Brown Katrina → Marcus Coal Company Inc; 1989-02-21 to 1990-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Double E Mining Inc → Double E Mining No 1; 1990-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tomblin Millard → Double E Mining No 1; 1990-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Millard → Double E Mining Inc; 1990-05-10 to current/open; source msha-controller-operator-history