# Relationship history for MSHA mine 1511584

Current hierarchy: **Commercial Coal Corp → Nukitt Coal Company → No 1 Tipple**

- 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:** Nukitt Coal Company → No 1 Tipple; 1978-09-01 to 1984-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Vericoals Sales Inc → No 1 Tipple; 1978-09-01 to 1984-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Vericoals Sales Inc → Nukitt Coal Company; 1978-09-01 to 1984-03-04; source msha-controller-operator-history
- **operator_operates_mine:** Nukitt Coal Company → No 1 Tipple; 1984-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Commercial Coal Corp → No 1 Tipple; 1984-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Commercial Coal Corp → Nukitt Coal Company; 1984-03-05 to current/open; source msha-controller-operator-history