# Relationship history for MSHA mine 1509747

Current hierarchy: **Stiltner Denver → Blue Star Coal Corp → No 5 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:** Ratliff James Delbert-Danny L & Donald E → No 5 Mine; 1974-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Regina Fuel Company → No 5 Mine; 1976-06-14 to 1981-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff James Delbert-Danny L & Donald E → Regina Fuel Company; 1976-06-14 to 1981-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Elkhorn Inc → No 5 Mine; 1981-06-16 to 1983-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Freeman Bruce Et Al → No 5 Mine; 1981-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeman Bruce Et Al → Cumberland Elkhorn Inc; 1981-06-16 to 1983-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Timmy  Ratliff et al → No 5 Mine; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Joson Coal Corp → No 5 Mine; 1983-01-19 to 1986-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Matney H B-Joe Hunsucker Et Al → No 5 Mine; 1983-01-19 to 1986-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Matney H B-Joe Hunsucker Et Al → Joson Coal Corp; 1983-01-19 to 1986-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Denver → No 5 Mine; 1985-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & R Coal Corp → No 5 Mine; 1986-01-03 to 1986-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Timmy  Ratliff et al → A & R Coal Corp; 1986-01-03 to 1986-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Ratliff et al → A & R Coal Corp; 1986-01-03 to 1986-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Blue Star Coal Corp → No 5 Mine; 1986-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Denver → Blue Star Coal Corp; 1986-10-13 to current/open; source msha-controller-operator-history