# Relationship history for MSHA mine 1510767

Current hierarchy: **Adkins Estil & Joe D Weddington → Emperor Coal Company → Tipple #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

- **operator_operates_mine:** Capitol Coal Sales Inc → Tipple #1; 1977-09-01 to 1980-11-23; source msha-controller-operator-history
- **controller_controls_mine:** Ryan Joe → Tipple #1; 1977-09-01 to 1980-11-23; source msha-controller-operator-history
- **controller_controls_operator:** Ryan Joe → Capitol Coal Sales Inc; 1977-09-01 to 1980-11-23; source msha-controller-operator-history
- **operator_operates_mine:** Emperor Coal Company → Tipple #1; 1980-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Estil & Joe D Weddington → Tipple #1; 1980-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Estil & Joe D Weddington → Emperor Coal Company; 1980-11-24 to current/open; source msha-controller-operator-history