# Relationship history for MSHA mine 4600506

Current hierarchy: **John C  Geupel → Steele Branch Mining → Surface Mine No 927**

- 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

- **operator_operates_mine:** Belva Coal Company Inc → Surface Mine No 927; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Impco-International Mining & Petroleum Co → Surface Mine No 927; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Impco-International Mining & Petroleum Co → Belva Coal Company Inc; 1950-01-01 to 1977-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → Surface Mine No 927; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belva Coal Company Inc → Surface Mine No 927; 1977-04-01 to 1989-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Belva Coal Company Inc; 1977-04-01 to 1989-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Flaugher Garland M → Surface Mine No 927; 1985-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Fork Resources & Development Corp → Surface Mine No 927; 1989-03-14 to 1989-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Flaugher Garland M → Little Fork Resources & Development Corp; 1989-03-14 to 1989-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Skyline Resources Inc → Surface Mine No 927; 1989-05-17 to 1989-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Saul Kimberly D → Surface Mine No 927; 1989-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saul Kimberly D → Skyline Resources Inc; 1989-05-17 to 1989-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Steele Branch Mining → Surface Mine No 927; 1989-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John C  Geupel → Surface Mine No 927; 1989-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John C  Geupel → Steele Branch Mining; 1989-11-20 to current/open; source msha-controller-operator-history