# Relationship history for MSHA mine 4404153

Current hierarchy: **Stiltner Carl & Reford Williamson → Hard Times Coal Company → 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:** Mc Clanahan Donald Keith → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Street Ralph Et Al → No 1 Mine; 1974-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sharron Coal Company Inc → No 1 Mine; 1975-07-29 to 1976-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clanahan Donald Keith → Sharron Coal Company Inc; 1975-07-29 to 1976-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Mole Coal Company Inc → No 1 Mine; 1976-02-27 to 1977-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Street Ralph Et Al → Mole Coal Company Inc; 1976-02-27 to 1977-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Burks Coal Company → No 1 Mine; 1977-12-13 to 1978-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Burks Boyd → No 1 Mine; 1977-12-13 to 1978-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Burks Boyd → Burks Coal Company; 1977-12-13 to 1978-02-28; source msha-controller-operator-history
- **operator_operates_mine:** P & J Coal Company Inc → No 1 Mine; 1978-03-01 to 1979-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Spahr John E Jr → No 1 Mine; 1978-03-01 to 1979-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Spahr John E Jr → P & J Coal Company Inc; 1978-03-01 to 1979-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Estep & Hurley Coal Company Inc → No 1 Mine; 1979-03-20 to 1979-07-08; source msha-controller-operator-history
- **controller_controls_mine:** Estep Paul → No 1 Mine; 1979-03-20 to 1979-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Estep Paul → Estep & Hurley Coal Company Inc; 1979-03-20 to 1979-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Hard Times Coal Company → No 1 Mine; 1979-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Carl & Reford Williamson → No 1 Mine; 1979-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Carl & Reford Williamson → Hard Times Coal Company; 1979-07-09 to current/open; source msha-controller-operator-history