# Relationship history for MSHA mine 0202159

Current hierarchy: **Turney P M & Lowell T Patton → Ash Peak Mining Company → Ash Peak Research & Development**

- 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:** Ash Peak Mining Company → Ash Peak Research & Development; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Turney P M & Lowell T Patton → Ash Peak Research & Development; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turney P M & Lowell T Patton → Ash Peak Mining Company; 1983-08-01 to current/open; source msha-controller-operator-history