# Relationship history for MSHA mine 4003235

Current hierarchy: **Brad J  Poynter; Darlene  Poynter → Stone Sales & Service Inc → Smith Mountain Quarry**

- 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

- **controller_controls_mine:** Brad J  Poynter et al → Smith Mountain Quarry; 1999-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stone Sales & Service Inc → Smith Mountain Quarry; 2004-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad J  Poynter et al → Stone Sales & Service Inc; 2004-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darlene  Poynter et al → Stone Sales & Service Inc; 2004-06-29 to current/open; source msha-controller-operator-history