# Relationship history for MSHA mine 1511739

Current hierarchy: **Infinity Coal Corp → Hickory Hill Development Corp → Fireclay 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:** Greene Sherman → Fireclay Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Gene & William Stiltner → Fireclay Mine; 1977-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowling Charles D Et Al → Fireclay Mine; 1978-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stiltner & Salyers Coal Company → Fireclay Mine; 1979-01-01 to 1979-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Gene & William Stiltner → Stiltner & Salyers Coal Company; 1979-01-01 to 1979-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Topaz Coal Company Inc → Fireclay Mine; 1979-07-10 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Daniel L → Fireclay Mine; 1979-07-10 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Daniel L → Topaz Coal Company Inc; 1979-07-10 to 1981-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Pond Creek Coal Company → Fireclay Mine; 1981-06-24 to 1983-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Greene Sherman → Pond Creek Coal Company; 1981-06-24 to 1983-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Star Coal Company Inc → Fireclay Mine; 1983-03-16 to 1983-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Charles D Et Al → Crystal Star Coal Company Inc; 1983-03-16 to 1983-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Congo Coal Company → Fireclay Mine; 1983-12-15 to 1984-10-23; source msha-controller-operator-history
- **controller_controls_mine:** William  Smith et al → Fireclay Mine; 1983-12-15 to 1984-10-23; source msha-controller-operator-history
- **controller_controls_operator:** William  Smith et al → Congo Coal Company; 1983-12-15 to 1984-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Hess Bryant → Fireclay Mine; 1984-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chic-Ha-Dee Coal Company → Fireclay Mine; 1984-10-24 to 1985-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Hess Bryant → Chic-Ha-Dee Coal Company; 1984-10-24 to 1985-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Black Lace Coal Company Inc → Fireclay Mine; 1985-09-11 to 1986-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Williamson Terry → Fireclay Mine; 1985-09-11 to 1986-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Williamson Terry → Black Lace Coal Company Inc; 1985-09-11 to 1986-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Black Lace Coal Company Inc → Fireclay Mine; 1986-06-17 to 1987-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Robinson Clyde → Fireclay Mine; 1986-06-17 to 1987-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Robinson Clyde → Black Lace Coal Company Inc; 1986-06-17 to 1987-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Ray Dean Mining Inc → Fireclay Mine; 1987-02-06 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Hall Forest D Et Al → Fireclay Mine; 1987-02-06 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Hall Forest D Et Al → Ray Dean Mining Inc; 1987-02-06 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Infinity Coal Corp → Fireclay Mine; 1989-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hickory Hill Development Corp → Fireclay Mine; 1990-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Infinity Coal Corp → Hickory Hill Development Corp; 1990-05-29 to current/open; source msha-controller-operator-history