# Relationship history for MSHA mine 0202619

Current hierarchy: **Johnston Dwayne → J D J Minerals Inc → Verdestone**

- 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:** Cwm Inc → Verdestone; 1994-03-01 to 1994-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Williams Ron → Verdestone; 1994-03-01 to 1994-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Williams Ron → Cwm Inc; 1994-03-01 to 1994-09-30; source msha-controller-operator-history
- **operator_operates_mine:** J D J Minerals Inc → Verdestone; 1994-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnston Dwayne → Verdestone; 1994-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnston Dwayne → J D J Minerals Inc; 1994-10-01 to current/open; source msha-controller-operator-history