# Relationship history for MSHA mine 4403614

Current hierarchy: **Sage Sammy → Travis Coal Inc → 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

- **controller_controls_mine:** Walker George F → No 1 Mine; 1950-01-01 to 1982-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Harman Mining Corp → No 1 Mine; 1973-01-01 to 1981-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Walker George F → Harman Mining Corp; 1973-01-01 to 1981-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Stevenson David & Leon → No 1 Mine; 1979-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harman Mining Corp → No 1 Mine; 1981-08-01 to 1982-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Inspiration Resources Corporation → No 1 Mine; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Inspiration Resources Corporation → Harman Mining Corp; 1981-08-01 to 1982-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Bandit Mining Corp → No 1 Mine; 1982-08-10 to 1985-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Stevenson David & Leon → Bandit Mining Corp; 1982-08-10 to 1985-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Travis Coal Inc → No 1 Mine; 1985-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sage Sammy Et Al → No 1 Mine; 1985-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sage Sammy Et Al → Travis Coal Inc; 1985-07-30 to current/open; source msha-controller-operator-history