# Relationship history for MSHA mine 4201579

Current hierarchy: **Boren Jack → Jack Boren Company → Price Pit**

- 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:** Price Is Right → Price Pit; 1979-01-01 to 1981-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Price Ken & Bud → Price Pit; 1979-01-01 to 1981-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Price Ken & Bud → Price Is Right; 1979-01-01 to 1981-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Jack Boren Company → Price Pit; 1981-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boren Jack → Price Pit; 1981-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boren Jack → Jack Boren Company; 1981-06-03 to current/open; source msha-controller-operator-history