# Relationship history for MSHA mine 3401972

Current hierarchy: **Danny A  Minor → Stone Center Of Oklahoma → Stone Center Of Oklahoma**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Stone Center Of Oklahoma → Stone Center Of Oklahoma; 2005-07-22 to 2006-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Trevor Graham  Sutcliffe → Stone Center Of Oklahoma; 2005-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trevor Graham  Sutcliffe → Stone Center Of Oklahoma; 2005-07-22 to 2006-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Stone Center Of Oklahoma → Stone Center Of Oklahoma; 2006-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danny A  Minor → Stone Center Of Oklahoma; 2006-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny A  Minor → Stone Center Of Oklahoma; 2006-08-29 to current/open; source msha-controller-operator-history