# Relationship history for MSHA mine 4002774

Current hierarchy: **East Texas Energy Company Inc → East Texas Energy Company Inc → Double D Mine Dayton**

- 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:** Double D Ltd → Double D Mine Dayton; 1982-03-01 to 1982-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Rowlette L D-Frank Seal Et Al → Double D Mine Dayton; 1982-03-01 to 1982-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Rowlette L D-Frank Seal Et Al → Double D Ltd; 1982-03-01 to 1982-09-09; source msha-controller-operator-history
- **operator_operates_mine:** East Texas Energy Company Inc → Double D Mine Dayton; 1982-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** East Texas Energy Company Inc Et Al → Double D Mine Dayton; 1982-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** East Texas Energy Company Inc Et Al → East Texas Energy Company Inc; 1982-09-10 to current/open; source msha-controller-operator-history