# Relationship history for MSHA mine 2601664

Current hierarchy: **Pehar John → John Pehar → Pehar Barite 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:** Spencer Robert → Pehar Barite Mine; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Myriad Mineral Resources Inc → Pehar Barite Mine; 1980-07-01 to 1981-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Spencer Robert → Myriad Mineral Resources Inc; 1980-07-01 to 1981-12-13; source msha-controller-operator-history
- **operator_operates_mine:** John Pehar → Pehar Barite Mine; 1981-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pehar John → Pehar Barite Mine; 1981-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pehar John → John Pehar; 1981-12-14 to current/open; source msha-controller-operator-history