# Relationship history for MSHA mine 3400914

Current hierarchy: **Hiatt Winston R → Hypace Energies Inc → Petrus Strip**

- 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:** Inland Empire Investment Corp → Petrus Strip; 1975-07-24 to 1975-11-05; source msha-controller-operator-history
- **controller_controls_mine:** West Roger H → Petrus Strip; 1975-07-24 to 1975-11-05; source msha-controller-operator-history
- **controller_controls_operator:** West Roger H → Inland Empire Investment Corp; 1975-07-24 to 1975-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Paul Rees Coal Co → Petrus Strip; 1975-11-06 to 1977-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Sexton Sam Jr → Petrus Strip; 1975-11-06 to 1977-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Sexton Sam Jr → Paul Rees Coal Co; 1975-11-06 to 1977-02-27; source msha-controller-operator-history
- **operator_operates_mine:** Hypace Energies Inc → Petrus Strip; 1977-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hiatt Winston R → Petrus Strip; 1977-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hiatt Winston R → Hypace Energies Inc; 1977-02-28 to current/open; source msha-controller-operator-history