# Relationship history for MSHA mine 4404876

Current hierarchy: **Pittston Company → Clinchfield Coal Company → Strip No 4**

- 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

- **controller_controls_mine:** Pittston Company → Strip No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K-E-Mo Energy Corp → Strip No 4; 1977-10-01 to 1978-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Elkins Charles C Et Al → Strip No 4; 1977-10-01 to 1978-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Elkins Charles C Et Al → K-E-Mo Energy Corp; 1977-10-01 to 1978-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Evergreen Industries Inc → Strip No 4; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sycamore Company Inc → Strip No 4; 1978-03-13 to 1979-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Evergreen Industries Inc → Sycamore Company Inc; 1978-03-13 to 1979-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Clinchfield Coal Company → Strip No 4; 1979-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Clinchfield Coal Company; 1979-08-08 to current/open; source msha-controller-operator-history