# Relationship history for MSHA mine 4104718

Current hierarchy: **Keelan  Chadwick → JKC Stone → JKC Stone**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rockdale Quarry / Stone Zone → JKC Stone; 2008-03-19 to 2009-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Larry D  Wood → JKC Stone; 2008-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry D  Wood → Rockdale Quarry / Stone Zone; 2008-03-19 to 2009-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Stone Zone → JKC Stone; 2009-06-01 to 2020-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Jill  Chadwick → JKC Stone; 2009-06-01 to 2013-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Jill  Chadwick → Stone Zone; 2009-06-01 to 2013-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Chadwick → JKC Stone; 2013-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Chadwick → Stone Zone; 2013-03-01 to 2020-10-26; source msha-controller-operator-history
- **operator_operates_mine:** JKC Stone → JKC Stone; 2020-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keelan  Chadwick → JKC Stone; 2020-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keelan  Chadwick → JKC Stone; 2020-10-27 to current/open; source msha-controller-operator-history