# Relationship history for MSHA mine 4406357

Current hierarchy: **Pittston Company → Paramont Coal Corp → Tank Hollow South #10**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Pittston Company → Tank Hollow South #10; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paramont Coal Corp → Tank Hollow South #10; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Paramont Coal Corp; 1987-01-01 to current/open; source msha-controller-operator-history