# Relationship history for MSHA mine 1512261

Current hierarchy: **Gorman L D → Hyde Coal Inc → Hyde Coal**

- 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:** Hyde Coal Inc → Hyde Coal; 1980-03-01 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Wells Paul S → Hyde Coal; 1980-03-01 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Wells Paul S → Hyde Coal Inc; 1980-03-01 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Hyde Coal Inc → Hyde Coal; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gorman L D → Hyde Coal; 1981-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gorman L D → Hyde Coal Inc; 1981-09-15 to current/open; source msha-controller-operator-history