# Relationship history for MSHA mine 3606380

Current hierarchy: **Jeffrey W McKeag; James K McKeag; Melissa M Young → P Stone Inc → P Stone Inc**

- 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:** P Stone Inc → P Stone Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James P McKeag → P Stone Inc; 1950-01-01 to 2019-12-19; source msha-controller-operator-history
- **controller_controls_operator:** James P McKeag → P Stone Inc; 1950-01-01 to 2019-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Melissa M Young et al → P Stone Inc; 2019-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melissa M Young et al → P Stone Inc; 2019-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey W McKeag et al → P Stone Inc; 2019-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James K McKeag et al → P Stone Inc; 2019-12-20 to current/open; source msha-controller-operator-history