# Relationship history for MSHA mine 1512017

Current hierarchy: **Terry  McCreary → Little Poplar Creek Heavy Equip Sales & Service → No 2 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:** Senters Harold & Clarence Senters Et Al → No 2 Mine; 1977-07-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Hill Coal Company → No 2 Mine; 1979-09-01 to 1980-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Senters Harold & Clarence Senters Et Al → Big Hill Coal Company; 1979-09-01 to 1980-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Alexandria Coal Sales (Ltd) → No 2 Mine; 1980-01-28 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Bill--James Carter & Claude Frazier → No 2 Mine; 1980-01-28 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Bill--James Carter & Claude Frazier → Alexandria Coal Sales (Ltd); 1980-01-28 to 1980-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Alexandria Coal Sales (Ltd) → No 2 Mine; 1980-10-01 to 1980-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Brown Roy → No 2 Mine; 1980-10-01 to 1980-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Brown Roy → Alexandria Coal Sales (Ltd); 1980-10-01 to 1980-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Alexandria Coal Sales Ltd → No 2 Mine; 1980-12-09 to 1982-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Lane John Et Al → No 2 Mine; 1980-12-09 to 1982-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Lane John Et Al → Alexandria Coal Sales Ltd; 1980-12-09 to 1982-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Little Poplar Creek Heavy Equip Sales & Service → No 2 Mine; 1982-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  McCreary et al → No 2 Mine; 1982-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  McCreary et al → Little Poplar Creek Heavy Equip Sales & Service; 1982-05-07 to current/open; source msha-controller-operator-history