# Relationship history for MSHA mine 4002648

Current hierarchy: **Williams Companies Inc → Cross Mountain Coal Inc → Katie No 1 Mine**

- 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:** Samco Inc → Katie No 1 Mine; 1980-10-01 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Mc Call Sam & Carlyle → Katie No 1 Mine; 1980-10-01 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Mc Call Sam & Carlyle → Samco Inc; 1980-10-01 to 1984-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Cross Mountain Coal Inc → Katie No 1 Mine; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → Katie No 1 Mine; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Cross Mountain Coal Inc; 1984-07-19 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Cross Mountain Coal Inc → Katie No 1 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → Katie No 1 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Cross Mountain Coal Inc; 1985-07-01 to current/open; source msha-controller-operator-history