# Relationship history for MSHA mine 1512472

Current hierarchy: **Bartley Eppie R → E M T Mining 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:** Basic American Industries → No 1 Mine; 1976-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Preece Homer & George → No 1 Mine; 1977-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Muncy Rush → No 1 Mine; 1979-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Dock A Et Al → No 1 Mine; 1980-02-01 to 1981-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Coleman Coal Company Inc → No 1 Mine; 1980-07-01 to 1981-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Dock A Et Al → Coleman Coal Company Inc; 1980-07-01 to 1981-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Preece Enterprises Inc → No 1 Mine; 1981-04-14 to 1982-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Preece Homer & George → Preece Enterprises Inc; 1981-04-14 to 1982-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Westerman Shannon → No 1 Mine; 1982-04-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thac-West Mining Inc → No 1 Mine; 1982-10-14 to 1984-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Westerman Shannon → Thac-West Mining Inc; 1982-10-14 to 1984-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Thac-West Mining Inc → No 1 Mine; 1984-06-25 to 1984-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Smith Warney → No 1 Mine; 1984-06-25 to 1984-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Smith Warney → Thac-West Mining Inc; 1984-06-25 to 1984-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Thac-West Mining Inc → No 1 Mine; 1984-08-06 to 1985-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Canada Larry → No 1 Mine; 1984-08-06 to 1985-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Canada Larry → Thac-West Mining Inc; 1984-08-06 to 1985-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Thornsbury Coal Company Inc → No 1 Mine; 1985-01-10 to 1985-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Thornsbury Ivan → No 1 Mine; 1985-01-10 to 1985-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Thornsbury Ivan → Thornsbury Coal Company Inc; 1985-01-10 to 1985-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Mary Helen Coal Company Inc → No 1 Mine; 1985-09-06 to 1985-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Basic American Industries → Mary Helen Coal Company Inc; 1985-09-06 to 1985-09-30; source msha-controller-operator-history
- **operator_operates_mine:** K-Lin Coal Company Inc → No 1 Mine; 1985-10-01 to 1986-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Gibson Loretta & Kendall Mounts → No 1 Mine; 1985-10-01 to 1986-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Gibson Loretta & Kendall Mounts → K-Lin Coal Company Inc; 1985-10-01 to 1986-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Five M Coal Company Inc → No 1 Mine; 1986-10-31 to 1987-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Muncy Rush → Five M Coal Company Inc; 1986-10-31 to 1987-10-15; source msha-controller-operator-history
- **operator_operates_mine:** E M T Mining Inc → No 1 Mine; 1987-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bartley Eppie R → No 1 Mine; 1987-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Eppie R → E M T Mining Inc; 1987-10-16 to current/open; source msha-controller-operator-history