# Relationship history for MSHA mine 4001166

Current hierarchy: **Williams Companies Inc → Valley View Coal Inc → No 2**

- 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:** Mc Call Enterprises Inc → No 2; 1950-01-01 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Mc Call Carlyle → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Call Carlyle → Mc Call Enterprises Inc; 1950-01-01 to 1984-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Valley View Coal Inc → No 2; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → No 2; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Valley View Coal Inc; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Valley View Coal Inc → No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Valley View Coal Inc; 1985-07-01 to current/open; source msha-controller-operator-history