# Relationship history for MSHA mine 1512746

Current hierarchy: **James River Coal Company → Primary Energies Corp → Primary Energies Tipple**

- 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:** Primary Energies Corp → Primary Energies Tipple; 1981-02-01 to 1992-01-22; source msha-controller-operator-history
- **controller_controls_mine:** William M  Deskins et al → Primary Energies Tipple; 1981-02-01 to 1992-01-22; source msha-controller-operator-history
- **controller_controls_operator:** William M  Deskins et al → Primary Energies Corp; 1981-02-01 to 1992-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Primary Energies Corp → Primary Energies Tipple; 1992-01-23 to 1994-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Garnie E  Johnson et al → Primary Energies Tipple; 1992-01-23 to 1994-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Garnie E  Johnson et al → Primary Energies Corp; 1992-01-23 to 1994-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Primary Energies Corp → Primary Energies Tipple; 1994-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Primary Energies Tipple; 1994-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Primary Energies Corp; 1994-07-27 to current/open; source msha-controller-operator-history