# Relationship history for MSHA mine 3003152

Current hierarchy: **Ronald  Markie; Stephen  Taran → Mar-Key Stone Corp → Mar-Key Stone Corp.**

- 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:** Mar-Key Stone Corp → Mar-Key Stone Corp.; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen  Taran et al → Mar-Key Stone Corp.; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Taran et al → Mar-Key Stone Corp; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Markie et al → Mar-Key Stone Corp; 1996-04-01 to current/open; source msha-controller-operator-history