# Relationship history for MSHA mine 0203310

Current hierarchy: **Mark  Scoville → Just Gets Better → Pyramid 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

- **operator_operates_mine:** Just Stone → Pyramid Mine; 2012-11-05 to 2019-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Broyles → Pyramid Mine; 2012-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Broyles → Just Stone; 2012-11-05 to 2019-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Just Gets Better → Pyramid Mine; 2019-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Scoville → Pyramid Mine; 2019-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Scoville → Just Gets Better; 2019-05-20 to current/open; source msha-controller-operator-history