# Relationship history for MSHA mine 4404833

Current hierarchy: **Pittston Company → Clinchfield Coal Company → Strip No 5**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Pittston Company → Strip No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Evergreen Industries Inc → Strip No 5; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sycamore Company Inc → Strip No 5; 1978-07-01 to 1979-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Evergreen Industries Inc → Sycamore Company Inc; 1978-07-01 to 1979-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Clinchfield Coal Company → Strip No 5; 1979-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Clinchfield Coal Company; 1979-08-15 to current/open; source msha-controller-operator-history