# Relationship history for MSHA mine 1507268

Current hierarchy: **Popplewell Danny → Cane Creek Inc → No 1 Surface**

- 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

- **operator_operates_mine:** Bell Knox Coal Co → No 1 Surface; 1974-01-01 to 1977-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Ausmus Clifford J & Lavera J → No 1 Surface; 1974-01-01 to 1977-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Ausmus Clifford J & Lavera J → Bell Knox Coal Co; 1974-01-01 to 1977-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Sykes Harry & John → No 1 Surface; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Metco Inc → No 1 Surface; 1977-07-19 to 1978-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Sykes Harry & John → Metco Inc; 1977-07-19 to 1978-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Cane Creek Inc → No 1 Surface; 1978-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Popplewell Danny → No 1 Surface; 1978-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Popplewell Danny → Cane Creek Inc; 1978-06-22 to current/open; source msha-controller-operator-history