# Relationship history for MSHA mine 1509553

Current hierarchy: **Sizemore William → Acme Energy International Inc → Becky Ann No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Caudill John F → Becky Ann No 1; 1975-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Caudill Construction Company Inc → Becky Ann No 1; 1976-03-01 to 1981-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Caudill John F → Caudill Construction Company Inc; 1976-03-01 to 1981-06-01; source msha-controller-operator-history
- **operator_operates_mine:** United Continental Coal Company Ltd → Becky Ann No 1; 1981-06-02 to 1982-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Christian Dave → Becky Ann No 1; 1981-06-02 to 1982-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Christian Dave → United Continental Coal Company Ltd; 1981-06-02 to 1982-12-19; source msha-controller-operator-history
- **operator_operates_mine:** Apex Coal Company Inc → Becky Ann No 1; 1982-12-20 to 1984-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Fallahi Charlotte & Caroline Hacker → Becky Ann No 1; 1982-12-20 to 1984-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Fallahi Charlotte & Caroline Hacker → Apex Coal Company Inc; 1982-12-20 to 1984-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Rexxon Corp Inc → Becky Ann No 1; 1984-11-14 to 1985-12-05; source msha-controller-operator-history
- **controller_controls_mine:** International & Domestic Development Corp → Becky Ann No 1; 1984-11-14 to 1985-12-05; source msha-controller-operator-history
- **controller_controls_operator:** International & Domestic Development Corp → Rexxon Corp Inc; 1984-11-14 to 1985-12-05; source msha-controller-operator-history
- **operator_operates_mine:** N R G Processing Inc → Becky Ann No 1; 1985-12-06 to 1986-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Naylor George H → Becky Ann No 1; 1985-12-06 to 1986-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Naylor George H → N R G Processing Inc; 1985-12-06 to 1986-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Acme Energy International Inc → Becky Ann No 1; 1986-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sizemore William → Becky Ann No 1; 1986-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sizemore William → Acme Energy International Inc; 1986-02-19 to current/open; source msha-controller-operator-history